diff --git a/src/attribute.rs b/src/attribute.rs
index 2debe9a..91091c5 100644
--- a/src/attribute.rs
+++ b/src/attribute.rs
@@ -195,7 +195,7 @@ impl FromStr for DecimalFloatingPoint {
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, PartialOrd)]
-pub struct SignedDecimalFloatingPoint(f64);
+pub struct SignedDecimalFloatingPoint(pub f64);
 impl Eq for SignedDecimalFloatingPoint {}
 impl fmt::Display for SignedDecimalFloatingPoint {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
diff --git a/src/tag/media_or_master_playlist.rs b/src/tag/media_or_master_playlist.rs
new file mode 100644
index 0000000..7c173bb
--- /dev/null
+++ b/src/tag/media_or_master_playlist.rs
@@ -0,0 +1,142 @@
+use std::fmt;
+use std::str::FromStr;
+
+use {Error, ErrorKind, Result};
+use attribute::{AttributePairs, SignedDecimalFloatingPoint};
+use types::{ProtocolVersion, YesOrNo};
+
+/// [4.3.5.1. EXT-X-INDEPENDENT-SEGMENTS]
+///
+/// [4.3.5.1. EXT-X-INDEPENDENT-SEGMENTS]: https://tools.ietf.org/html/rfc8216#section-4.3.5.1
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct ExtXIndependentSegments;
+impl ExtXIndependentSegments {
+    pub(crate) const PREFIX: &'static str = "#EXT-X-INDEPENDENT-SEGMENTS";
+
+    /// Returns the protocol compatibility version that this tag requires.
+    pub fn requires_version(&self) -> ProtocolVersion {
+        ProtocolVersion::V1
+    }
+}
+impl fmt::Display for ExtXIndependentSegments {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Self::PREFIX.fmt(f)
+    }
+}
+impl FromStr for ExtXIndependentSegments {
+    type Err = Error;
+    fn from_str(s: &str) -> Result<Self> {
+        track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
+        Ok(ExtXIndependentSegments)
+    }
+}
+
+/// [4.3.5.2. EXT-X-START]
+///
+/// [4.3.5.2. EXT-X-START]: https://tools.ietf.org/html/rfc8216#section-4.3.5.2
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct ExtXStart {
+    time_offset: SignedDecimalFloatingPoint,
+    precise: YesOrNo,
+}
+impl ExtXStart {
+    pub(crate) const PREFIX: &'static str = "#EXT-X-START:";
+
+    /// Makes a new `ExtXStart` tag.
+    pub fn new(time_offset: SignedDecimalFloatingPoint) -> Self {
+        ExtXStart {
+            time_offset,
+            precise: YesOrNo::No,
+        }
+    }
+
+    /// Makes a new `ExtXStart` tag with the given `precise` flag.
+    pub fn with_precise(time_offset: SignedDecimalFloatingPoint, precise: YesOrNo) -> Self {
+        ExtXStart {
+            time_offset,
+            precise,
+        }
+    }
+
+    /// Returns the time offset of the media segments in the playlist.
+    pub fn time_offset(&self) -> SignedDecimalFloatingPoint {
+        self.time_offset
+    }
+
+    /// Returns whether clients should not render media stream whose presentation times are
+    /// prior to the specified time offset.
+    pub fn precise(&self) -> YesOrNo {
+        self.precise
+    }
+
+    /// Returns the protocol compatibility version that this tag requires.
+    pub fn requires_version(&self) -> ProtocolVersion {
+        ProtocolVersion::V1
+    }
+}
+impl fmt::Display for ExtXStart {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", Self::PREFIX)?;
+        write!(f, "TIME-OFFSET={}", self.time_offset)?;
+        if self.precise == YesOrNo::Yes {
+            write!(f, ",PRECISE={}", self.precise)?;
+        }
+        Ok(())
+    }
+}
+impl FromStr for ExtXStart {
+    type Err = Error;
+    fn from_str(s: &str) -> Result<Self> {
+        track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
+
+        let mut time_offset = None;
+        let mut precise = None;
+        let attrs = AttributePairs::parse(s.split_at(Self::PREFIX.len()).1);
+        for attr in attrs {
+            let (key, value) = track!(attr)?;
+            match key {
+                "TIME-OFFSET" => time_offset = Some(track!(value.parse())?),
+                "PRECISE" => precise = Some(track!(value.parse())?),
+                _ => {
+                    // [6.3.1. General Client Responsibilities]
+                    // > ignore any attribute/value pair with an unrecognized AttributeName.
+                }
+            }
+        }
+
+        let time_offset = track_assert_some!(time_offset, ErrorKind::InvalidInput);
+        Ok(ExtXStart {
+            time_offset,
+            precise: precise.unwrap_or(YesOrNo::No),
+        })
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn ext_x_independent_segments() {
+        let tag = ExtXIndependentSegments;
+        let text = "#EXT-X-INDEPENDENT-SEGMENTS";
+        assert_eq!(text.parse().ok(), Some(tag));
+        assert_eq!(tag.to_string(), text);
+        assert_eq!(tag.requires_version(), ProtocolVersion::V1);
+    }
+
+    #[test]
+    fn ext_x_start() {
+        let tag = ExtXStart::new(SignedDecimalFloatingPoint(-1.23));
+        let text = "#EXT-X-START:TIME-OFFSET=-1.23";
+        assert_eq!(text.parse().ok(), Some(tag));
+        assert_eq!(tag.to_string(), text);
+        assert_eq!(tag.requires_version(), ProtocolVersion::V1);
+
+        let tag = ExtXStart::with_precise(SignedDecimalFloatingPoint(1.23), YesOrNo::Yes);
+        let text = "#EXT-X-START:TIME-OFFSET=1.23,PRECISE=YES";
+        assert_eq!(text.parse().ok(), Some(tag));
+        assert_eq!(tag.to_string(), text);
+        assert_eq!(tag.requires_version(), ProtocolVersion::V1);
+    }
+}
diff --git a/src/tag/mod.rs b/src/tag/mod.rs
index 415945c..e879e0e 100644
--- a/src/tag/mod.rs
+++ b/src/tag/mod.rs
@@ -5,8 +5,6 @@ use std::fmt;
 use std::str::FromStr;
 
 use {Error, ErrorKind, Result};
-use attribute::{AttributePairs, SignedDecimalFloatingPoint};
-use types::YesOrNo;
 
 macro_rules! may_invalid {
     ($expr:expr) => {
@@ -27,6 +25,7 @@ macro_rules! impl_from {
 pub use self::basic::{ExtM3u, ExtXVersion};
 pub use self::master_playlist::{ExtXIFrameStreamInf, ExtXMedia, ExtXSessionData, ExtXSessionKey,
                                 ExtXStreamInf};
+pub use self::media_or_master_playlist::{ExtXIndependentSegments, ExtXStart};
 pub use self::media_playlist::{ExtXDiscontinuitySequence, ExtXEndList, ExtXIFramesOnly,
                                ExtXMediaSequence, ExtXPlaylistType, ExtXTargetDuration};
 pub use self::media_segment::{ExtInf, ExtXByteRange, ExtXDateRange, ExtXDiscontinuity, ExtXKey,
@@ -34,6 +33,7 @@ pub use self::media_segment::{ExtInf, ExtXByteRange, ExtXDateRange, ExtXDisconti
 
 mod basic;
 mod master_playlist;
+mod media_or_master_playlist;
 mod media_playlist;
 mod media_segment;
 
@@ -229,70 +229,3 @@ impl FromStr for Tag {
         }
     }
 }
-
-// 4.3.5.  Media or Master Playlist Tags
-// TODO: A tag that appears in both MUST have the same value; otherwise, clients SHOULD ignore the value in the Media Playlist(s).
-// TODO: These tags MUST NOT appear more than once in a Playlist.
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct ExtXIndependentSegments;
-impl ExtXIndependentSegments {
-    const PREFIX: &'static str = "#EXT-X-INDEPENDENT-SEGMENTS";
-}
-impl fmt::Display for ExtXIndependentSegments {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        Self::PREFIX.fmt(f)
-    }
-}
-impl FromStr for ExtXIndependentSegments {
-    type Err = Error;
-    fn from_str(s: &str) -> Result<Self> {
-        track_assert_eq!(s, Self::PREFIX, ErrorKind::InvalidInput);
-        Ok(ExtXIndependentSegments)
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct ExtXStart {
-    pub time_offset: SignedDecimalFloatingPoint,
-    pub precise: YesOrNo,
-}
-impl ExtXStart {
-    const PREFIX: &'static str = "#EXT-X-START:";
-}
-impl fmt::Display for ExtXStart {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "{}", Self::PREFIX)?;
-        write!(f, "TIME-OFFSET={}", self.time_offset)?;
-        if self.precise == YesOrNo::Yes {
-            write!(f, ",PRECISE={}", self.precise)?;
-        }
-        Ok(())
-    }
-}
-impl FromStr for ExtXStart {
-    type Err = Error;
-    fn from_str(s: &str) -> Result<Self> {
-        track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
-
-        let mut time_offset = None;
-        let mut precise = None;
-        let attrs = AttributePairs::parse(s.split_at(Self::PREFIX.len()).1);
-        for attr in attrs {
-            let (key, value) = track!(attr)?;
-            match key {
-                "TIME-OFFSET" => time_offset = Some(track!(value.parse())?),
-                "PRECISE" => precise = Some(track!(value.parse())?),
-                _ => {
-                    // [6.3.1] ignore any attribute/value pair with an unrecognized AttributeName.
-                }
-            }
-        }
-
-        let time_offset = track_assert_some!(time_offset, ErrorKind::InvalidInput);
-        Ok(ExtXStart {
-            time_offset,
-            precise: precise.unwrap_or(YesOrNo::No),
-        })
-    }
-}