diff --git a/Cargo.toml b/Cargo.toml
index 56f935f..a421ff6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,19 +17,18 @@ travis-ci = { repository = "PoiScript/orgize" }
 
 [features]
 default = ["serde"]
-extra-serde-info = ["serde"]
 
 [dependencies]
 bytecount = "0.5.1"
 chrono = { version = "0.4.7", optional = true }
-indextree = "3.2.0"
+indextree = "3.3.0"
 jetscii = "0.4.4"
-memchr = "2.2.0"
-serde = { version = "1.0.94", optional = true, features = ["derive"] }
+memchr = "2.2.1"
+serde = { version = "1.0.97", optional = true, features = ["derive"] }
 nom = "5.0.0"
 
 [dev-dependencies]
 lazy_static = "1.3.0"
 pretty_assertions = "0.6.1"
-serde_json = "1.0.39"
+serde_json = "1.0.40"
 slugify = "0.1.0"
diff --git a/README.md b/README.md
index 5bd5c6d..d98571b 100644
--- a/README.md
+++ b/README.md
@@ -190,8 +190,6 @@ By now, orgize provides three features:
 
 + `serde`: adds the ability to serialize `Org` and other elements using `serde`, enabled by default.
 
-+ `extra-serde-info`: includes the position information while serializing, disabled by default.
-
 + `chrono`: adds the ability to convert `Datetime` into `chrono` struct, disabled by default.
 
 ## License
diff --git a/src/elements/block.rs b/src/elements/block.rs
index bf5cd9f..9cf5df0 100644
--- a/src/elements/block.rs
+++ b/src/elements/block.rs
@@ -9,13 +9,11 @@ pub struct Block<'a> {
     pub name: &'a str,
     #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
     pub args: Option<&'a str>,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
 }
 
 impl Block<'_> {
     #[inline]
-    pub(crate) fn parse(text: &str) -> Option<(&str, Element<'_>)> {
+    pub(crate) fn parse(text: &str) -> Option<(&str, Element<'_>, &str)> {
         debug_assert!(text.starts_with("#+"));
 
         if text.len() <= 8 || text[2..8].to_uppercase() != "BEGIN_" {
@@ -40,11 +38,8 @@ impl Block<'_> {
             if text[pos..i].trim().eq_ignore_ascii_case(&end) {
                 return Some((
                     &text[i + 1..],
-                    Element::Block(Block {
-                        name,
-                        args,
-                        contents: &text[off..pos],
-                    }),
+                    Element::Block(Block { name, args }),
+                    &text[off..pos],
                 ));
             }
 
@@ -52,14 +47,7 @@ impl Block<'_> {
         }
 
         if text[pos..].trim().eq_ignore_ascii_case(&end) {
-            Some((
-                "",
-                Element::Block(Block {
-                    name,
-                    args,
-                    contents: &text[off..pos],
-                }),
-            ))
+            Some(("", Element::Block(Block { name, args }), &text[off..pos]))
         } else {
             None
         }
@@ -75,8 +63,8 @@ fn parse() {
             Element::Block(Block {
                 name: "SRC",
                 args: None,
-                contents: ""
             }),
+            ""
         ))
     );
     assert_eq!(
@@ -86,8 +74,8 @@ fn parse() {
             Element::Block(Block {
                 name: "SRC",
                 args: Some("javascript"),
-                contents: "console.log('Hello World!');\n"
             }),
+            "console.log('Hello World!');\n"
         ))
     );
     // TODO: more testing
diff --git a/src/elements/drawer.rs b/src/elements/drawer.rs
index 7c274ce..69c528f 100644
--- a/src/elements/drawer.rs
+++ b/src/elements/drawer.rs
@@ -7,13 +7,11 @@ use crate::elements::Element;
 #[derive(Debug)]
 pub struct Drawer<'a> {
     pub name: &'a str,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
 }
 
 impl Drawer<'_> {
     #[inline]
-    pub(crate) fn parse(text: &str) -> Option<(&str, Element<'_>)> {
+    pub(crate) fn parse(text: &str) -> Option<(&str, Element<'_>, &str)> {
         debug_assert!(text.starts_with(':'));
 
         let mut lines = memchr_iter(b'\n', text.as_bytes());
@@ -36,8 +34,8 @@ impl Drawer<'_> {
                     &text[i + 1..],
                     Element::Drawer(Drawer {
                         name: &name[0..name.len() - 1],
-                        contents: &text[off..pos],
                     }),
+                    &text[off..pos],
                 ));
             }
             pos = i + 1;
@@ -48,8 +46,8 @@ impl Drawer<'_> {
                 "",
                 Element::Drawer(Drawer {
                     name: &name[0..name.len() - 1],
-                    contents: &text[off..pos],
                 }),
+                &text[off..pos],
             ))
         } else {
             None
@@ -63,10 +61,8 @@ fn parse() {
         Drawer::parse(":PROPERTIES:\n  :CUSTOM_ID: id\n  :END:"),
         Some((
             "",
-            Element::Drawer(Drawer {
-                name: "PROPERTIES",
-                contents: "  :CUSTOM_ID: id\n"
-            })
+            Element::Drawer(Drawer { name: "PROPERTIES" }),
+            "  :CUSTOM_ID: id\n"
         ))
     )
 }
diff --git a/src/elements/dyn_block.rs b/src/elements/dyn_block.rs
index 5fada24..ced6b5c 100644
--- a/src/elements/dyn_block.rs
+++ b/src/elements/dyn_block.rs
@@ -9,14 +9,11 @@ pub struct DynBlock<'a> {
     pub block_name: &'a str,
     #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
     pub arguments: Option<&'a str>,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
 }
 
 impl DynBlock<'_> {
     #[inline]
-    // return (dyn_block, contents-begin, contents-end, end)
-    pub(crate) fn parse(text: &str) -> Option<(&str, Element<'_>)> {
+    pub(crate) fn parse(text: &str) -> Option<(&str, Element<'_>, &str)> {
         debug_assert!(text.starts_with("#+"));
 
         if text.len() <= "#+BEGIN: ".len() || !text[2..9].eq_ignore_ascii_case("BEGIN: ") {
@@ -50,8 +47,8 @@ impl DynBlock<'_> {
                     Element::DynBlock(DynBlock {
                         block_name: name,
                         arguments: para,
-                        contents: &text[off..pos],
                     }),
+                    &text[off..pos],
                 ));
             }
 
@@ -64,8 +61,8 @@ impl DynBlock<'_> {
                 Element::DynBlock(DynBlock {
                     block_name: name,
                     arguments: para,
-                    contents: &text[off..pos],
                 }),
+                &text[off..pos],
             ))
         } else {
             None
@@ -83,8 +80,8 @@ fn parse() {
             Element::DynBlock(DynBlock {
                 block_name: "clocktable",
                 arguments: Some(":scope file"),
-                contents: "CONTENTS\n"
-            },)
+            }),
+            "CONTENTS\n"
         ))
     );
 }
diff --git a/src/elements/fn_def.rs b/src/elements/fn_def.rs
index 7859cd0..c3680fa 100644
--- a/src/elements/fn_def.rs
+++ b/src/elements/fn_def.rs
@@ -1,39 +1,32 @@
 use memchr::memchr;
+use nom::{
+    bytes::complete::{tag, take_while1},
+    IResult,
+};
 
 #[cfg_attr(test, derive(PartialEq))]
 #[cfg_attr(feature = "serde", derive(serde::Serialize))]
 #[derive(Debug)]
 pub struct FnDef<'a> {
     pub label: &'a str,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
+}
+
+fn parse_label(input: &str) -> IResult<&str, &str> {
+    let (input, _) = tag("[fn:")(input)?;
+    let (input, label) =
+        take_while1(|c: char| c.is_ascii_alphanumeric() || c == '-' || c == '_')(input)?;
+    let (input, _) = tag("]")(input)?;
+    Ok((input, label))
 }
 
 impl FnDef<'_> {
     #[inline]
-    pub(crate) fn parse(text: &str) -> Option<(&str, FnDef<'_>)> {
-        if text.starts_with("[fn:") {
-            let (label, off) = memchr(b']', text.as_bytes())
-                .filter(|&i| {
-                    i != 4
-                        && text.as_bytes()["[fn:".len()..i]
-                            .iter()
-                            .all(|&c| c.is_ascii_alphanumeric() || c == b'-' || c == b'_')
-                })
-                .map(|i| (&text["[fn:".len()..i], i + 1))?;
+    pub(crate) fn parse(text: &str) -> Option<(&str, FnDef<'_>, &str)> {
+        let (tail, label) = parse_label(text).ok()?;
 
-            let end = memchr(b'\n', text.as_bytes()).unwrap_or_else(|| text.len());
+        let end = memchr(b'\n', tail.as_bytes()).unwrap_or_else(|| tail.len());
 
-            Some((
-                &text[end..],
-                FnDef {
-                    label,
-                    contents: &text[off..end],
-                },
-            ))
-        } else {
-            None
-        }
+        Some((&tail[end..], FnDef { label }, &tail[0..end]))
     }
 }
 
@@ -41,43 +34,19 @@ impl FnDef<'_> {
 fn parse() {
     assert_eq!(
         FnDef::parse("[fn:1] https://orgmode.org"),
-        Some((
-            "",
-            FnDef {
-                label: "1",
-                contents: " https://orgmode.org"
-            },
-        ))
+        Some(("", FnDef { label: "1" }, " https://orgmode.org"))
     );
     assert_eq!(
         FnDef::parse("[fn:word_1] https://orgmode.org"),
-        Some((
-            "",
-            FnDef {
-                label: "word_1",
-                contents: " https://orgmode.org"
-            },
-        ))
+        Some(("", FnDef { label: "word_1" }, " https://orgmode.org"))
     );
     assert_eq!(
         FnDef::parse("[fn:WORD-1] https://orgmode.org"),
-        Some((
-            "",
-            FnDef {
-                label: "WORD-1",
-                contents: " https://orgmode.org"
-            },
-        ))
+        Some(("", FnDef { label: "WORD-1" }, " https://orgmode.org"))
     );
     assert_eq!(
         FnDef::parse("[fn:WORD]"),
-        Some((
-            "",
-            FnDef {
-                label: "WORD",
-                contents: ""
-            },
-        ))
+        Some(("", FnDef { label: "WORD" }, ""))
     );
     assert_eq!(FnDef::parse("[fn:] https://orgmode.org"), None);
     assert_eq!(FnDef::parse("[fn:wor d] https://orgmode.org"), None);
diff --git a/src/elements/headline.rs b/src/elements/headline.rs
index 7805bba..92d38a5 100644
--- a/src/elements/headline.rs
+++ b/src/elements/headline.rs
@@ -22,12 +22,13 @@ pub struct Headline<'a> {
     /// headline keyword
     #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
     pub keyword: Option<&'a str>,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
 }
 
 impl Headline<'_> {
-    pub(crate) fn parse<'a>(text: &'a str, config: &ParseConfig<'_>) -> (&'a str, Headline<'a>) {
+    pub(crate) fn parse<'a>(
+        text: &'a str,
+        config: &ParseConfig<'_>,
+    ) -> (&'a str, Headline<'a>, &'a str) {
         let level = memchr2(b'\n', b' ', text.as_bytes()).unwrap_or_else(|| text.len());
 
         debug_assert!(level > 0);
@@ -55,8 +56,8 @@ impl Headline<'_> {
                     priority: None,
                     title: "",
                     tags: Vec::new(),
-                    contents: &text[off..end],
                 },
+                &text[off..end],
             );
         }
 
@@ -108,8 +109,8 @@ impl Headline<'_> {
                 priority,
                 title,
                 tags: tags.split(':').filter(|s| !s.is_empty()).collect(),
-                contents: &text[off..end],
             },
+            &text[off..end],
         )
     }
 
@@ -165,8 +166,8 @@ fn parse() {
                 keyword: Some("DONE"),
                 title: "COMMENT Title",
                 tags: vec!["tag", "a2%"],
-                contents: ""
             },
+            ""
         )
     );
     assert_eq!(
@@ -179,8 +180,8 @@ fn parse() {
                 tags: vec!["tag", "a2%"],
                 title: "ToDO [#A] COMMENT Title",
                 keyword: None,
-                contents: ""
             },
+            ""
         )
     );
     assert_eq!(
@@ -193,8 +194,8 @@ fn parse() {
                 tags: vec!["tag", "a2%"],
                 title: "T0DO [#A] COMMENT Title",
                 keyword: None,
-                contents: ""
             },
+            ""
         )
     );
     assert_eq!(
@@ -207,8 +208,8 @@ fn parse() {
                 tags: vec!["tag", "a2%"],
                 title: "[#1] COMMENT Title",
                 keyword: Some("DONE"),
-                contents: "",
             },
+            ""
         )
     );
     assert_eq!(
@@ -221,8 +222,8 @@ fn parse() {
                 tags: vec!["tag", "a2%"],
                 title: "[#a] COMMENT Title",
                 keyword: Some("DONE"),
-                contents: "",
             },
+            ""
         )
     );
     assert_eq!(
@@ -235,8 +236,8 @@ fn parse() {
                 tags: Vec::new(),
                 title: "COMMENT Title :tag:a2%",
                 keyword: Some("DONE"),
-                contents: ""
             },
+            ""
         )
     );
     assert_eq!(
@@ -249,8 +250,8 @@ fn parse() {
                 tags: Vec::new(),
                 title: "COMMENT Title tag:a2%:",
                 keyword: Some("DONE"),
-                contents: ""
             },
+            ""
         )
     );
     assert_eq!(
@@ -263,8 +264,8 @@ fn parse() {
                 tags: Vec::new(),
                 title: "COMMENT Title tag:a2%:",
                 keyword: None,
-                contents: ""
             },
+            ""
         )
     );
 }
@@ -287,8 +288,8 @@ fn parse_todo_keywords() {
                 keyword: None,
                 title: "DONE [#A] COMMENT Title",
                 tags: vec!["tag", "a2%"],
-                contents: ""
             },
+            ""
         )
     );
     assert_eq!(
@@ -307,8 +308,8 @@ fn parse_todo_keywords() {
                 keyword: Some("TASK"),
                 title: "COMMENT Title",
                 tags: vec!["tag", "a2%"],
-                contents: ""
             },
+            ""
         )
     );
 }
diff --git a/src/elements/list.rs b/src/elements/list.rs
index 2deac9e..326f501 100644
--- a/src/elements/list.rs
+++ b/src/elements/list.rs
@@ -4,16 +4,14 @@ use std::iter::once;
 #[cfg_attr(test, derive(PartialEq))]
 #[cfg_attr(feature = "serde", derive(serde::Serialize))]
 #[derive(Debug)]
-pub struct List<'a> {
+pub struct List {
     pub indent: usize,
     pub ordered: bool,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
 }
 
-impl List<'_> {
+impl List {
     #[inline]
-    pub(crate) fn parse(text: &str) -> Option<(&str, List<'_>)> {
+    pub(crate) fn parse(text: &str) -> Option<(&str, List, &str)> {
         let (indent, tail) = text
             .find(|c| c != ' ')
             .map(|off| (off, &text[off..]))
@@ -33,14 +31,7 @@ impl List<'_> {
                 if line_indent < indent
                     || (line_indent == indent && is_item(&line[line_indent..]).is_none())
                 {
-                    Some((
-                        &text[pos..],
-                        List {
-                            indent,
-                            ordered,
-                            contents: &text[0..pos],
-                        },
-                    ))
+                    Some((&text[pos..], List { indent, ordered }, &text[0..pos]))
                 } else {
                     pos = i;
                     continue;
@@ -52,48 +43,20 @@ impl List<'_> {
                     if line_indent < indent
                         || (line_indent == indent && is_item(&line[line_indent..]).is_none())
                     {
-                        Some((
-                            &text[pos..],
-                            List {
-                                indent,
-                                ordered,
-                                contents: &text[0..pos],
-                            },
-                        ))
+                        Some((&text[pos..], List { indent, ordered }, &text[0..pos]))
                     } else {
                         pos = next_i;
                         continue;
                     }
                 } else {
-                    Some((
-                        &text[next_i..],
-                        List {
-                            indent,
-                            ordered,
-                            contents: &text[0..pos],
-                        },
-                    ))
+                    Some((&text[next_i..], List { indent, ordered }, &text[0..pos]))
                 }
             } else {
-                Some((
-                    &text[i..],
-                    List {
-                        indent,
-                        ordered,
-                        contents: &text[0..pos],
-                    },
-                ))
+                Some((&text[i..], List { indent, ordered }, &text[0..pos]))
             };
         }
 
-        Some((
-            &text[pos..],
-            List {
-                indent,
-                ordered,
-                contents: &text[0..pos],
-            },
-        ))
+        Some((&text[pos..], List { indent, ordered }, &text[0..pos]))
     }
 }
 
@@ -102,12 +65,11 @@ impl List<'_> {
 #[derive(Debug)]
 pub struct ListItem<'a> {
     pub bullet: &'a str,
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    pub contents: &'a str,
 }
 
 impl ListItem<'_> {
-    pub(crate) fn parse(text: &str, indent: usize) -> (&str, ListItem<'_>) {
+    #[inline]
+    pub(crate) fn parse(text: &str, indent: usize) -> (&str, ListItem<'_>, &str) {
         debug_assert!(&text[0..indent].trim().is_empty());
         let off = &text[indent..].find(' ').unwrap() + 1 + indent;
 
@@ -125,8 +87,8 @@ impl ListItem<'_> {
                         &text[pos..],
                         ListItem {
                             bullet: &text[indent..off],
-                            contents: &text[off..pos],
                         },
+                        &text[off..pos],
                     );
                 }
             }
@@ -137,8 +99,8 @@ impl ListItem<'_> {
             "",
             ListItem {
                 bullet: &text[indent..off],
-                contents: &text[off..],
             },
+            &text[off..],
         )
     }
 }
@@ -197,8 +159,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "+ item1\n+ item2"
             },
+            "+ item1\n+ item2"
         ))
     );
     assert_eq!(
@@ -208,8 +170,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "* item1\n  \n* item2"
             },
+            "* item1\n  \n* item2"
         ))
     );
     assert_eq!(
@@ -219,8 +181,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "* item1\n"
             },
+            "* item1\n"
         ))
     );
     assert_eq!(
@@ -230,8 +192,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "* item1\n"
             },
+            "* item1\n"
         ))
     );
     assert_eq!(
@@ -241,8 +203,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "+ item1\n  + item2\n"
             },
+            "+ item1\n  + item2\n"
         ))
     );
     assert_eq!(
@@ -252,8 +214,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "+ item1\n  \n  + item2\n   \n+ item 3"
             },
+            "+ item1\n  \n  + item2\n   \n+ item 3"
         ))
     );
     assert_eq!(
@@ -263,8 +225,8 @@ fn list_parse() {
             List {
                 indent: 2,
                 ordered: false,
-                contents: "  + item1\n  \n  + item2"
             },
+            "  + item1\n  \n  + item2"
         ))
     );
     assert_eq!(
@@ -274,8 +236,8 @@ fn list_parse() {
             List {
                 indent: 0,
                 ordered: false,
-                contents: "+ 1\n\n  - 2\n\n  - 3\n\n+ 4"
             },
+            "+ 1\n\n  - 2\n\n  - 3\n\n+ 4"
         ))
     );
 }
diff --git a/src/elements/macros.rs b/src/elements/macros.rs
index ae348a9..949e453 100644
--- a/src/elements/macros.rs
+++ b/src/elements/macros.rs
@@ -44,7 +44,7 @@ fn parse() {
             Element::Macros(Macros {
                 name: "poem",
                 arguments: Some("red,blue")
-            },)
+            })
         ))
     );
     assert_eq!(
@@ -54,7 +54,7 @@ fn parse() {
             Element::Macros(Macros {
                 name: "poem",
                 arguments: Some(")")
-            },)
+            })
         ))
     );
     assert_eq!(
@@ -64,7 +64,7 @@ fn parse() {
             Element::Macros(Macros {
                 name: "author",
                 arguments: None
-            },)
+            })
         ))
     );
     assert!(Macros::parse("{{{0uthor}}}").is_err());
diff --git a/src/elements/mod.rs b/src/elements/mod.rs
index 42d64ff..44a6579 100644
--- a/src/elements/mod.rs
+++ b/src/elements/mod.rs
@@ -56,23 +56,16 @@ pub use self::{
 #[derive(Debug)]
 #[cfg_attr(test, derive(PartialEq))]
 #[cfg_attr(feature = "serde", derive(serde::Serialize))]
-#[cfg_attr(feature = "serde", serde(tag = "type"))]
-#[cfg_attr(feature = "serde", serde(rename_all = "snake_case"))]
+#[cfg_attr(feature = "serde", serde(tag = "type", rename_all = "snake_case"))]
 pub enum Element<'a> {
     Block(Block<'a>),
     BabelCall(BabelCall<'a>),
-    Section {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
+    Section,
     Clock(Clock<'a>),
     Cookie(Cookie<'a>),
-    RadioTarget(RadioTarget<'a>),
+    RadioTarget(RadioTarget),
     Drawer(Drawer<'a>),
-    Document {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
+    Document,
     DynBlock(DynBlock<'a>),
     FnDef(FnDef<'a>),
     FnRef(FnRef<'a>),
@@ -81,49 +74,24 @@ pub enum Element<'a> {
     InlineSrc(InlineSrc<'a>),
     Keyword(Keyword<'a>),
     Link(Link<'a>),
-    List(List<'a>),
+    List(List),
     ListItem(ListItem<'a>),
     Macros(Macros<'a>),
     Planning(Planning<'a>),
     Snippet(Snippet<'a>),
-    Text {
-        value: &'a str,
-    },
-    Paragraph {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
+    Text { value: &'a str },
+    Paragraph,
     Rule,
     Timestamp(Timestamp<'a>),
     Target(Target<'a>),
-    Bold {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
-    Strike {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
-    Italic {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
-    Underline {
-        #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-        contents: &'a str,
-    },
-    Verbatim {
-        value: &'a str,
-    },
-    Code {
-        value: &'a str,
-    },
-    Comment {
-        value: &'a str,
-    },
-    FixedWidth {
-        value: &'a str,
-    },
+    Bold,
+    Strike,
+    Italic,
+    Underline,
+    Verbatim { value: &'a str },
+    Code { value: &'a str },
+    Comment { value: &'a str },
+    FixedWidth { value: &'a str },
 }
 
 macro_rules! impl_from {
@@ -140,7 +108,6 @@ impl_from!(Block);
 impl_from!(BabelCall);
 impl_from!(Clock);
 impl_from!(Cookie);
-impl_from!(RadioTarget);
 impl_from!(Drawer);
 impl_from!(DynBlock);
 impl_from!(FnDef);
@@ -150,7 +117,6 @@ impl_from!(InlineCall);
 impl_from!(InlineSrc);
 impl_from!(Keyword);
 impl_from!(Link);
-impl_from!(List);
 impl_from!(ListItem);
 impl_from!(Macros);
 impl_from!(Planning);
diff --git a/src/elements/radio_target.rs b/src/elements/radio_target.rs
index 0f5c48b..71a3f68 100644
--- a/src/elements/radio_target.rs
+++ b/src/elements/radio_target.rs
@@ -10,14 +10,11 @@ use crate::elements::Element;
 #[cfg_attr(test, derive(PartialEq))]
 #[cfg_attr(feature = "serde", derive(serde::Serialize))]
 #[derive(Debug)]
-pub struct RadioTarget<'a> {
-    #[cfg_attr(all(feature = "serde", not(feature = "extra-serde-info")), serde(skip))]
-    contents: &'a str,
-}
+pub struct RadioTarget;
 
-impl RadioTarget<'_> {
+impl RadioTarget {
     #[inline]
-    pub(crate) fn parse(input: &str) -> IResult<&str, Element<'_>> {
+    pub(crate) fn parse(input: &str) -> IResult<&str, (Element, &str)> {
         let (input, _) = tag("<<<")(input)?;
         let (input, contents) = verify(
             take_while(|c: char| c != '<' && c != '\n' && c != '>'),
@@ -25,7 +22,7 @@ impl RadioTarget<'_> {
         )(input)?;
         let (input, _) = tag(">>>")(input)?;
 
-        Ok((input, Element::RadioTarget(RadioTarget { contents })))
+        Ok((input, (Element::RadioTarget(RadioTarget), contents)))
     }
 }
 
@@ -33,16 +30,11 @@ impl RadioTarget<'_> {
 fn parse() {
     assert_eq!(
         RadioTarget::parse("<<<target>>>"),
-        Ok(("", Element::RadioTarget(RadioTarget { contents: "target" })))
+        Ok(("", (Element::RadioTarget(RadioTarget), "target")))
     );
     assert_eq!(
         RadioTarget::parse("<<<tar get>>>"),
-        Ok((
-            "",
-            Element::RadioTarget(RadioTarget {
-                contents: "tar get"
-            },)
-        ))
+        Ok(("", (Element::RadioTarget(RadioTarget), "tar get")))
     );
     assert!(RadioTarget::parse("<<<target >>>").is_err());
     assert!(RadioTarget::parse("<<< target>>>").is_err());
diff --git a/src/export/mod.rs b/src/export/mod.rs
index fd87f01..99260ce 100644
--- a/src/export/mod.rs
+++ b/src/export/mod.rs
@@ -1,3 +1,5 @@
 pub mod html;
+pub mod org;
 
 pub use html::{DefaultHtmlHandler, HtmlHandler};
+pub use org::{DefaultOrgHandler, OrgHandler};
diff --git a/src/lib.rs b/src/lib.rs
index fe3cc6e..5618724 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -201,8 +201,6 @@
 //!
 //! + `serde`: adds the ability to serialize `Org` and other elements using `serde`, enabled by default.
 //!
-//! + `extra-serde-info`: includes the position information while serializing, disabled by default.
-//!
 //! + `chrono`: adds the ability to convert `Datetime` into `chrono` struct, disabled by default.
 //!
 //! # License
diff --git a/src/org.rs b/src/org.rs
index b2aa315..56a964a 100644
--- a/src/org.rs
+++ b/src/org.rs
@@ -5,7 +5,7 @@ use std::io::{Error, Write};
 
 use crate::config::ParseConfig;
 use crate::elements::*;
-use crate::export::{DefaultHtmlHandler, HtmlHandler};
+use crate::export::*;
 use crate::iter::Iter;
 
 pub struct Org<'a> {
@@ -13,19 +13,104 @@ pub struct Org<'a> {
     pub(crate) document: NodeId,
 }
 
+enum Container<'a> {
+    // List
+    List {
+        content: &'a str,
+        node: NodeId,
+        indent: usize,
+    },
+    // Block, List Item
+    Block {
+        content: &'a str,
+        node: NodeId,
+    },
+    // Pargraph, Inline Markup
+    Inline {
+        content: &'a str,
+        node: NodeId,
+    },
+    // Headline, Document
+    Headline {
+        content: &'a str,
+        node: NodeId,
+    },
+    // Section
+    Section {
+        content: &'a str,
+        node: NodeId,
+    },
+}
+
 impl<'a> Org<'a> {
     pub fn parse(text: &'a str) -> Self {
         Org::parse_with_config(text, ParseConfig::default())
     }
 
-    pub fn parse_with_config(text: &'a str, config: ParseConfig<'_>) -> Self {
+    pub fn parse_with_config(content: &'a str, config: ParseConfig<'_>) -> Self {
         let mut arena = Arena::new();
-        let document = arena.new_node(Element::Document { contents: text });
+        let document = arena.new_node(Element::Document);
 
-        let mut org = Org { arena, document };
-        org.parse_internal(config);
+        let mut containers = vec![Container::Headline {
+            content,
+            node: document,
+        }];
 
-        org
+        while let Some(container) = containers.pop() {
+            match container {
+                Container::Headline {
+                    mut content,
+                    node: parent,
+                } => {
+                    if !content.is_empty() {
+                        let off = Headline::find_level(content, std::usize::MAX);
+                        if off != 0 {
+                            let node = arena.new_node(Element::Section);
+                            parent.append(node, &mut arena).unwrap();
+                            containers.push(Container::Section {
+                                content: &content[0..off],
+                                node,
+                            });
+                            content = &content[off..];
+                        }
+                    }
+                    while !content.is_empty() {
+                        let (tail, headline, headline_content) = Headline::parse(content, &config);
+                        let headline = Element::Headline(headline);
+                        let node = arena.new_node(headline);
+                        parent.append(node, &mut arena).unwrap();
+                        containers.push(Container::Headline {
+                            content: headline_content,
+                            node,
+                        });
+                        content = tail;
+                    }
+                }
+                Container::Section { content, node } => {
+                    // TODO
+                    if let Some((tail, _planning)) = Planning::parse(content) {
+                        parse_elements_children(&mut arena, tail, node, &mut containers);
+                    } else {
+                        parse_elements_children(&mut arena, content, node, &mut containers);
+                    }
+                }
+                Container::Block { content, node } => {
+                    parse_elements_children(&mut arena, content, node, &mut containers);
+                }
+                Container::Inline { content, node } => {
+                    parse_objects_children(&mut arena, content, node, &mut containers);
+                }
+                Container::List {
+                    content,
+                    node,
+                    indent,
+                } => {
+                    parse_list_items(&mut arena, content, indent, node, &mut containers);
+                }
+            }
+        }
+
+        Org { arena, document }
     }
 
     pub fn iter(&'a self) -> Iter<'a> {
@@ -49,376 +134,370 @@ impl<'a> Org<'a> {
 
         for event in self.iter() {
             match event {
-                Start(e) => handler.start(&mut writer, e)?,
-                End(e) => handler.end(&mut writer, e)?,
+                Start(element) => handler.start(&mut writer, element)?,
+                End(element) => handler.end(&mut writer, element)?,
             }
         }
 
         Ok(())
     }
+}
 
-    fn parse_internal(&mut self, config: ParseConfig<'_>) {
-        let mut node = self.document;
-        loop {
-            match self.arena[node].data {
-                Element::Document { mut contents }
-                | Element::Headline(Headline { mut contents, .. }) => {
-                    if !contents.is_empty() {
-                        let off = Headline::find_level(contents, std::usize::MAX);
-                        if off != 0 {
-                            let section = Element::Section {
-                                contents: &contents[0..off],
-                            };
-                            let new_node = self.arena.new_node(section);
-                            node.append(new_node, &mut self.arena).unwrap();
-                            contents = &contents[off..];
-                        }
-                    }
-                    while !contents.is_empty() {
-                        let (tail, headline) = Headline::parse(contents, &config);
-                        let headline = Element::Headline(headline);
-                        let new_node = self.arena.new_node(headline);
-                        node.append(new_node, &mut self.arena).unwrap();
-                        contents = tail;
-                    }
-                }
-                Element::Section { contents } => {
-                    // TODO
-                    if let Some((tail, _planning)) = Planning::parse(contents) {
-                        self.parse_elements_children(tail, node);
-                    } else {
-                        self.parse_elements_children(contents, node);
-                    }
-                }
-                Element::Block(Block { contents, .. })
-                | Element::ListItem(ListItem { contents, .. }) => {
-                    self.parse_elements_children(contents, node);
-                }
-                Element::Paragraph { contents }
-                | Element::Bold { contents }
-                | Element::Underline { contents }
-                | Element::Italic { contents }
-                | Element::Strike { contents } => {
-                    self.parse_objects_children(contents, node);
-                }
-                Element::List(List {
-                    contents, indent, ..
-                }) => {
-                    self.parse_list_items(contents, indent, node);
-                }
-                _ => (),
-            }
+fn parse_elements_children<'a>(
+    arena: &mut Arena<Element<'a>>,
+    content: &'a str,
+    parent: NodeId,
+    containers: &mut Vec<Container<'a>>,
+) {
+    let mut tail = skip_empty_lines(content);
 
-            if let Some(next_node) = self.next_node(node) {
-                node = next_node;
-            } else {
-                break;
-            }
-        }
+    if let Some((new_tail, element)) = parse_element(content, arena, containers) {
+        parent.append(element, arena).unwrap();
+        tail = skip_empty_lines(new_tail);
     }
 
-    fn next_node(&self, mut node: NodeId) -> Option<NodeId> {
-        if let Some(child) = self.arena[node].first_child() {
-            return Some(child);
-        }
+    let mut text = tail;
+    let mut pos = 0;
 
-        loop {
-            if let Some(sibling) = self.arena[node].next_sibling() {
-                return Some(sibling);
-            } else if let Some(parent) = self.arena[node].parent() {
-                node = parent;
-            } else {
-                return None;
-            }
-        }
-    }
-
-    fn parse_elements_children(&mut self, input: &'a str, node: NodeId) {
-        let mut tail = skip_empty_lines(input);
-
-        if let Some((new_tail, element)) = self.parse_element(input) {
-            let new_node = self.arena.new_node(element);
-            node.append(new_node, &mut self.arena).unwrap();
-            tail = skip_empty_lines(new_tail);
-        }
-
-        let mut text = tail;
-        let mut pos = 0;
-
-        while !tail.is_empty() {
-            let i = memchr(b'\n', tail.as_bytes())
-                .map(|i| i + 1)
-                .unwrap_or_else(|| tail.len());
-            if tail.as_bytes()[0..i].iter().all(u8::is_ascii_whitespace) {
-                tail = skip_empty_lines(&tail[i..]);
-                let new_node = self.arena.new_node(Element::Paragraph {
-                    contents: if text.as_bytes()[pos - 1] == b'\n' {
-                        &text[0..pos - 1]
-                    } else {
-                        &text[0..pos]
-                    },
-                });
-                node.append(new_node, &mut self.arena).unwrap();
-                text = tail;
-                pos = 0;
-            } else if let Some((new_tail, element)) = self.parse_element(tail) {
-                if pos != 0 {
-                    let new_node = self.arena.new_node(Element::Paragraph {
-                        contents: if text.as_bytes()[pos - 1] == b'\n' {
-                            &text[0..pos - 1]
-                        } else {
-                            &text[0..pos]
-                        },
-                    });
-                    node.append(new_node, &mut self.arena).unwrap();
-                    pos = 0;
-                }
-                let new_node = self.arena.new_node(element);
-                node.append(new_node, &mut self.arena).unwrap();
-                tail = skip_empty_lines(new_tail);
-                text = tail;
-            } else {
-                tail = &tail[i..];
-                pos += i;
-            }
-        }
-
-        if !text.is_empty() {
-            let new_node = self.arena.new_node(Element::Paragraph {
-                contents: if text.as_bytes()[pos - 1] == b'\n' {
-                    &text[0..pos - 1]
-                } else {
-                    &text[0..pos]
-                },
+    while !tail.is_empty() {
+        let i = memchr(b'\n', tail.as_bytes())
+            .map(|i| i + 1)
+            .unwrap_or_else(|| tail.len());
+        if tail.as_bytes()[0..i].iter().all(u8::is_ascii_whitespace) {
+            tail = skip_empty_lines(&tail[i..]);
+            let node = arena.new_node(Element::Paragraph);
+            parent.append(node, arena).unwrap();
+            containers.push(Container::Inline {
+                content: &text[0..pos].trim_end_matches('\n'),
+                node,
             });
-            node.append(new_node, &mut self.arena).unwrap();
-        }
-    }
-
-    fn parse_element(&self, contents: &'a str) -> Option<(&'a str, Element<'a>)> {
-        if let Some((tail, fn_def)) = FnDef::parse(contents) {
-            let fn_def = Element::FnDef(fn_def);
-            return Some((tail, fn_def));
-        } else if let Some((tail, list)) = List::parse(contents) {
-            let list = Element::List(list);
-            return Some((tail, list));
-        }
-
-        let tail = contents.trim_start();
-
-        if let Some((tail, clock)) = Clock::parse(tail) {
-            return Some((tail, clock));
-        }
-
-        // TODO: LaTeX environment
-        if tail.starts_with("\\begin{") {}
-
-        if tail.starts_with('-') {
-            if let Ok((tail, rule)) = Rule::parse(tail) {
-                return Some((tail, rule));
+            text = tail;
+            pos = 0;
+        } else if let Some((new_tail, element)) = parse_element(tail, arena, containers) {
+            if pos != 0 {
+                let node = arena.new_node(Element::Paragraph);
+                parent.append(node, arena).unwrap();
+                containers.push(Container::Inline {
+                    content: &text[0..pos].trim_end_matches('\n'),
+                    node,
+                });
+                pos = 0;
             }
-        }
-
-        if tail.starts_with(':') {
-            if let Some((tail, drawer)) = Drawer::parse(tail) {
-                return Some((tail, drawer));
-            }
-        }
-
-        if tail == ":" || tail.starts_with(": ") || tail.starts_with(":\n") {
-            let mut last_end = 1; // ":"
-            for i in memchr_iter(b'\n', contents.as_bytes()) {
-                last_end = i + 1;
-                let line = &contents[last_end..];
-                if !(line == ":" || line.starts_with(": ") || line.starts_with(":\n")) {
-                    let fixed_width = Element::FixedWidth {
-                        value: &contents[0..i + 1],
-                    };
-                    return Some((&contents[i + 1..], fixed_width));
-                }
-            }
-            let fixed_width = Element::FixedWidth {
-                value: &contents[0..last_end],
-            };
-            return Some((&contents[last_end..], fixed_width));
-        }
-
-        if tail == "#" || tail.starts_with("# ") || tail.starts_with("#\n") {
-            let mut last_end = 1; // "#"
-            for i in memchr_iter(b'\n', contents.as_bytes()) {
-                last_end = i + 1;
-                let line = &contents[last_end..];
-                if !(line == "#" || line.starts_with("# ") || line.starts_with("#\n")) {
-                    let fixed_width = Element::Comment {
-                        value: &contents[0..i + 1],
-                    };
-                    return Some((&contents[i + 1..], fixed_width));
-                }
-            }
-            let fixed_width = Element::Comment {
-                value: &contents[0..last_end],
-            };
-            return Some((&contents[last_end..], fixed_width));
-        }
-
-        if tail.starts_with("#+") {
-            Block::parse(tail)
-                .or_else(|| DynBlock::parse(tail))
-                .or_else(|| Keyword::parse(tail).ok())
+            parent.append(element, arena).unwrap();
+            tail = skip_empty_lines(new_tail);
+            text = tail;
         } else {
-            None
+            tail = &tail[i..];
+            pos += i;
         }
     }
 
-    fn parse_objects_children(&mut self, contents: &'a str, node: NodeId) {
-        let mut tail = contents;
+    if !text.is_empty() {
+        let node = arena.new_node(Element::Paragraph);
+        parent.append(node, arena).unwrap();
+        containers.push(Container::Inline {
+            content: &text[0..pos].trim_end_matches('\n'),
+            node,
+        });
+    }
+}
 
-        if let Some((new_tail, obj)) = self.parse_object(tail) {
-            let new_node = self.arena.new_node(obj);
-            node.append(new_node, &mut self.arena).unwrap();
-            tail = new_tail;
+fn parse_element<'a>(
+    contents: &'a str,
+    arena: &mut Arena<Element<'a>>,
+    containers: &mut Vec<Container<'a>>,
+) -> Option<(&'a str, NodeId)> {
+    if let Some((tail, fn_def, content)) = FnDef::parse(contents) {
+        let node = arena.new_node(Element::FnDef(fn_def));
+        containers.push(Container::Block { content, node });
+        return Some((tail, node));
+    } else if let Some((tail, list, content)) = List::parse(contents) {
+        let indent = list.indent;
+        let node = arena.new_node(Element::List(list));
+        containers.push(Container::List {
+            content,
+            node,
+            indent,
+        });
+        return Some((tail, node));
+    }
+
+    let tail = contents.trim_start();
+
+    if let Some((tail, clock)) = Clock::parse(tail) {
+        return Some((tail, arena.new_node(clock)));
+    }
+
+    // TODO: LaTeX environment
+    if tail.starts_with("\\begin{") {}
+
+    if tail.starts_with('-') {
+        if let Ok((tail, rule)) = Rule::parse(tail) {
+            return Some((tail, arena.new_node(rule)));
         }
+    }
 
-        let mut text = tail;
-        let mut pos = 0;
+    if tail.starts_with(':') {
+        if let Some((tail, drawer, content)) = Drawer::parse(tail) {
+            return Some((tail, arena.new_node(drawer)));
+        }
+    }
 
-        let bs = bytes!(b'@', b'<', b'[', b' ', b'(', b'{', b'\'', b'"', b'\n');
+    // FixedWidth
+    if tail == ":" || tail.starts_with(": ") || tail.starts_with(":\n") {
+        let mut last_end = 1; // ":"
+        for i in memchr_iter(b'\n', contents.as_bytes()) {
+            last_end = i + 1;
+            let line = &contents[last_end..];
+            if !(line == ":" || line.starts_with(": ") || line.starts_with(":\n")) {
+                let fixed_width = arena.new_node(Element::FixedWidth {
+                    value: &contents[0..i + 1],
+                });
+                return Some((&contents[i + 1..], fixed_width));
+            }
+        }
+        let fixed_width = arena.new_node(Element::FixedWidth {
+            value: &contents[0..last_end],
+        });
+        return Some((&contents[last_end..], fixed_width));
+    }
 
-        while let Some(off) = bs.find(tail.as_bytes()) {
-            match tail.as_bytes()[off] {
-                b'{' => {
-                    if let Some((new_tail, obj)) = self.parse_object(&tail[off..]) {
-                        if pos != 0 {
-                            let new_node = self.arena.new_node(Element::Text {
-                                value: &text[0..pos + off],
-                            });
-                            node.append(new_node, &mut self.arena).unwrap();
-                            pos = 0;
-                        }
-                        let new_node = self.arena.new_node(obj);
-                        node.append(new_node, &mut self.arena).unwrap();
-                        tail = new_tail;
-                        text = new_tail;
-                    } else if let Some((new_tail, obj)) = self.parse_object(&tail[off + 1..]) {
-                        let new_node = self.arena.new_node(Element::Text {
-                            value: &text[0..pos + off + 1],
+    // Comment
+    if tail == "#" || tail.starts_with("# ") || tail.starts_with("#\n") {
+        let mut last_end = 1; // "#"
+        for i in memchr_iter(b'\n', contents.as_bytes()) {
+            last_end = i + 1;
+            let line = &contents[last_end..];
+            if !(line == "#" || line.starts_with("# ") || line.starts_with("#\n")) {
+                let comment = arena.new_node(Element::Comment {
+                    value: &contents[0..i + 1],
+                });
+                return Some((&contents[i + 1..], comment));
+            }
+        }
+        let comment = arena.new_node(Element::Comment {
+            value: &contents[0..last_end],
+        });
+        return Some((&contents[last_end..], comment));
+    }
+
+    if tail.starts_with("#+") {
+        if let Some((tail, block, content)) = Block::parse(tail) {
+            let node = arena.new_node(block);
+            containers.push(Container::Block { content, node });
+            Some((tail, node))
+        } else if let Some((tail, dyn_block, content)) = DynBlock::parse(tail) {
+            let node = arena.new_node(dyn_block);
+            containers.push(Container::Block { content, node });
+            Some((tail, node))
+        } else {
+            Keyword::parse(tail)
+                .ok()
+                .map(|(tail, kw)| (tail, arena.new_node(kw)))
+        }
+    } else {
+        None
+    }
+}
+
+fn parse_objects_children<'a>(
+    arena: &mut Arena<Element<'a>>,
+    content: &'a str,
+    parent: NodeId,
+    containers: &mut Vec<Container<'a>>,
+) {
+    let mut tail = content;
+
+    if let Some((new_tail, obj)) = parse_object(tail, arena, containers) {
+        parent.append(obj, arena).unwrap();
+        tail = new_tail;
+    }
+
+    let mut text = tail;
+    let mut pos = 0;
+
+    let bs = bytes!(b'@', b'<', b'[', b' ', b'(', b'{', b'\'', b'"', b'\n');
+
+    while let Some(off) = bs.find(tail.as_bytes()) {
+        match tail.as_bytes()[off] {
+            b'{' => {
+                if let Some((new_tail, obj)) = parse_object(&tail[off..], arena, containers) {
+                    if pos != 0 {
+                        let node = arena.new_node(Element::Text {
+                            value: &text[0..pos + off],
                         });
-                        node.append(new_node, &mut self.arena).unwrap();
+                        parent.append(node, arena).unwrap();
                         pos = 0;
-                        let new_node = self.arena.new_node(obj);
-                        node.append(new_node, &mut self.arena).unwrap();
-                        tail = new_tail;
-                        text = new_tail;
-                    } else {
-                        tail = &tail[off + 1..];
-                        pos += off + 1;
                     }
+                    parent.append(obj, arena).unwrap();
+                    tail = new_tail;
+                    text = new_tail;
+                    continue;
+                } else if let Some((new_tail, obj)) =
+                    parse_object(&tail[off + 1..], arena, containers)
+                {
+                    let node = arena.new_node(Element::Text {
+                        value: &text[0..pos + off + 1],
+                    });
+                    parent.append(node, arena).unwrap();
+                    pos = 0;
+                    parent.append(obj, arena).unwrap();
+                    tail = new_tail;
+                    text = new_tail;
+                    continue;
                 }
-                b' ' | b'(' | b'\'' | b'"' | b'\n' => {
-                    if let Some((new_tail, obj)) = self.parse_object(&tail[off + 1..]) {
-                        let new_node = self.arena.new_node(Element::Text {
-                            value: &text[0..pos + off + 1],
+            }
+            b' ' | b'(' | b'\'' | b'"' | b'\n' => {
+                if let Some((new_tail, obj)) = parse_object(&tail[off + 1..], arena, containers) {
+                    let node = arena.new_node(Element::Text {
+                        value: &text[0..pos + off + 1],
+                    });
+                    parent.append(node, arena).unwrap();
+                    pos = 0;
+                    parent.append(obj, arena).unwrap();
+                    tail = new_tail;
+                    text = new_tail;
+                    continue;
+                }
+            }
+            _ => {
+                if let Some((new_tail, obj)) = parse_object(&tail[off..], arena, containers) {
+                    if pos != 0 {
+                        let node = arena.new_node(Element::Text {
+                            value: &text[0..pos + off],
                         });
-                        node.append(new_node, &mut self.arena).unwrap();
+                        parent.append(node, arena).unwrap();
                         pos = 0;
-                        let new_node = self.arena.new_node(obj);
-                        node.append(new_node, &mut self.arena).unwrap();
-                        tail = new_tail;
-                        text = new_tail;
-                    } else {
-                        tail = &tail[off + 1..];
-                        pos += off + 1;
-                    }
-                }
-                _ => {
-                    if let Some((new_tail, obj)) = self.parse_object(&tail[off..]) {
-                        if pos != 0 {
-                            let new_node = self.arena.new_node(Element::Text {
-                                value: &text[0..pos + off],
-                            });
-                            node.append(new_node, &mut self.arena).unwrap();
-                            pos = 0;
-                        }
-                        let new_node = self.arena.new_node(obj);
-                        node.append(new_node, &mut self.arena).unwrap();
-                        tail = new_tail;
-                        text = new_tail;
-                    } else {
-                        tail = &tail[off + 1..];
-                        pos += off + 1;
                     }
+                    parent.append(obj, arena).unwrap();
+                    tail = new_tail;
+                    text = new_tail;
+                    continue;
                 }
             }
         }
-
-        if !text.is_empty() {
-            let new_node = self.arena.new_node(Element::Text { value: text });
-            node.append(new_node, &mut self.arena).unwrap();
-        }
+        tail = &tail[off + 1..];
+        pos += off + 1;
     }
 
-    fn parse_object(&self, contents: &'a str) -> Option<(&'a str, Element<'a>)> {
-        if contents.len() < 3 {
-            return None;
-        }
+    if !text.is_empty() {
+        let node = arena.new_node(Element::Text { value: text });
+        parent.append(node, arena).unwrap();
+    }
+}
 
-        let bytes = contents.as_bytes();
-        match bytes[0] {
-            b'@' => Snippet::parse(contents).ok(),
-            b'{' => Macros::parse(contents).ok(),
-            b'<' => RadioTarget::parse(contents)
-                .or_else(|_| Target::parse(contents))
-                .or_else(|_| {
-                    Timestamp::parse_active(contents)
-                        .map(|(tail, timestamp)| (tail, timestamp.into()))
-                })
-                .or_else(|_| {
-                    Timestamp::parse_diary(contents)
-                        .map(|(tail, timestamp)| (tail, timestamp.into()))
-                })
-                .ok(),
-            b'[' => {
-                if contents[1..].starts_with("fn:") {
-                    FnRef::parse(contents).map(|(tail, fn_ref)| (tail, fn_ref.into()))
-                } else if bytes[1] == b'[' {
-                    Link::parse(contents).ok()
-                } else {
-                    Cookie::parse(contents)
-                        .map(|(tail, cookie)| (tail, cookie.into()))
-                        .or_else(|| {
-                            Timestamp::parse_inactive(contents)
-                                .map(|(tail, timestamp)| (tail, timestamp.into()))
-                                .ok()
-                        })
-                }
-            }
-            b'*' => parse_emphasis(contents, b'*')
-                .map(|(tail, contents)| (tail, Element::Bold { contents })),
-            b'+' => parse_emphasis(contents, b'+')
-                .map(|(tail, contents)| (tail, Element::Strike { contents })),
-            b'/' => parse_emphasis(contents, b'/')
-                .map(|(tail, contents)| (tail, Element::Italic { contents })),
-            b'_' => parse_emphasis(contents, b'_')
-                .map(|(tail, contents)| (tail, Element::Underline { contents })),
-            b'=' => parse_emphasis(contents, b'=')
-                .map(|(tail, value)| (tail, Element::Verbatim { value })),
-            b'~' => {
-                parse_emphasis(contents, b'~').map(|(tail, value)| (tail, Element::Code { value }))
-            }
-            b's' if contents.starts_with("src_") => InlineSrc::parse(contents).ok(),
-            b'c' if contents.starts_with("call_") => InlineCall::parse(contents).ok(),
-            _ => None,
-        }
+fn parse_object<'a>(
+    contents: &'a str,
+    arena: &mut Arena<Element<'a>>,
+    containers: &mut Vec<Container<'a>>,
+) -> Option<(&'a str, NodeId)> {
+    if contents.len() < 3 {
+        return None;
     }
 
-    fn parse_list_items(&mut self, mut contents: &'a str, indent: usize, node: NodeId) {
-        while !contents.is_empty() {
-            let (tail, list_item) = ListItem::parse(contents, indent);
-            let list_item = Element::ListItem(list_item);
-            let new_node = self.arena.new_node(list_item);
-            node.append(new_node, &mut self.arena).unwrap();
-            contents = tail;
+    let bytes = contents.as_bytes();
+    match bytes[0] {
+        b'@' => Snippet::parse(contents)
+            .ok()
+            .map(|(tail, element)| (tail, arena.new_node(element))),
+        b'{' => Macros::parse(contents)
+            .ok()
+            .map(|(tail, element)| (tail, arena.new_node(element))),
+        b'<' => RadioTarget::parse(contents)
+            .map(|(tail, (radio, content))| (tail, radio))
+            .or_else(|_| Target::parse(contents))
+            .or_else(|_| {
+                Timestamp::parse_active(contents).map(|(tail, timestamp)| (tail, timestamp.into()))
+            })
+            .or_else(|_| {
+                Timestamp::parse_diary(contents).map(|(tail, timestamp)| (tail, timestamp.into()))
+            })
+            .ok()
+            .map(|(tail, element)| (tail, arena.new_node(element))),
+        b'[' => {
+            if contents[1..].starts_with("fn:") {
+                FnRef::parse(contents)
+                    .map(|(tail, fn_ref)| (tail, fn_ref.into()))
+                    .map(|(tail, element)| (tail, arena.new_node(element)))
+            } else if bytes[1] == b'[' {
+                Link::parse(contents)
+                    .ok()
+                    .map(|(tail, element)| (tail, arena.new_node(element)))
+            } else {
+                Cookie::parse(contents)
+                    .map(|(tail, cookie)| (tail, cookie.into()))
+                    .or_else(|| {
+                        Timestamp::parse_inactive(contents)
+                            .map(|(tail, timestamp)| (tail, timestamp.into()))
+                            .ok()
+                    })
+                    .map(|(tail, element)| (tail, arena.new_node(element)))
+            }
         }
+        b'*' => {
+            if let Some((tail, content)) = parse_emphasis(contents, b'*') {
+                let node = arena.new_node(Element::Bold);
+                containers.push(Container::Inline { content, node });
+                Some((tail, node))
+            } else {
+                None
+            }
+        }
+        b'+' => {
+            if let Some((tail, content)) = parse_emphasis(contents, b'+') {
+                let node = arena.new_node(Element::Strike);
+                containers.push(Container::Inline { content, node });
+                Some((tail, node))
+            } else {
+                None
+            }
+        }
+        b'/' => {
+            if let Some((tail, content)) = parse_emphasis(contents, b'/') {
+                let node = arena.new_node(Element::Italic);
+                containers.push(Container::Inline { content, node });
+                Some((tail, node))
+            } else {
+                None
+            }
+        }
+        b'_' => {
+            if let Some((tail, content)) = parse_emphasis(contents, b'_') {
+                let node = arena.new_node(Element::Underline);
+                containers.push(Container::Inline { content, node });
+                Some((tail, node))
+            } else {
+                None
+            }
+        }
+        b'=' => parse_emphasis(contents, b'=')
+            .map(|(tail, value)| (tail, arena.new_node(Element::Verbatim { value }))),
+        b'~' => parse_emphasis(contents, b'~')
+            .map(|(tail, value)| (tail, arena.new_node(Element::Code { value }))),
+        b's' => InlineSrc::parse(contents)
+            .ok()
+            .map(|(tail, element)| (tail, arena.new_node(element))),
+        b'c' => InlineCall::parse(contents)
+            .ok()
+            .map(|(tail, element)| (tail, arena.new_node(element))),
+        _ => None,
+    }
+}
+
+fn parse_list_items<'a>(
+    arena: &mut Arena<Element<'a>>,
+    mut contents: &'a str,
+    indent: usize,
+    parent: NodeId,
+    containers: &mut Vec<Container<'a>>,
+) {
+    while !contents.is_empty() {
+        let (tail, list_item, content) = ListItem::parse(contents, indent);
+        let list_item = Element::ListItem(list_item);
+        let node = arena.new_node(list_item);
+        parent.append(node, arena).unwrap();
+        containers.push(Container::Block { content, node });
+        contents = tail;
     }
 }