-[[!table data="""
-Feature |iTunes RSS|iTunes Atom|Downcast RSS|Downcast Atom
-Feed image | - | - | - | -
-Feed title | + | + | + | +
-Feed publisher | - | - | - | -
-Feed "category" | - | - | - | -
-Feed date | + | + | + | +
-Feed description | - | - | - | -
-Episode image | - | - | - | -
-Episode title | + | + | + | +
-Episode date | + | + | + | +
-Episode duration | - | - | - | -
-Episode author | + | + | + | +
-Episode description| + | + | + | -
-Episode enclosure | + | + | + | +
-"""]]
+* [iTunes-specific tags](https://www.apple.com/itunes/podcasts/specs.html)
+ appear to be RSS-only
+ * If they work in Atom, teach `inline` to optionally iTunesify RSS/Atom.
+ * Else, add `itunes` as a third kind of feed (RSS plus more stuff).
+* Notable tags for feeds:
+ * `itunes:subtitle`
+ * `itunes:author`
+ * `itunes:summary` (same as `description`)
+ * `itunes:owner` (includes `itunes:name` and `itunes:email`)
+ * `itunes:image href=''`
+ * `itunes:publisher`
+ * `itunes:category text=''` (can contain subcategories)
+ * `itunes:keywords`
+* Notable tags for entries:
+ * `itunes:duration`
+ * [[!cpan Audio::TagLib]] might be fastest, if present and applicable
+ * [ffprobe](http://ffmpeg.org/ffprobe.html) is reasonably fast
+ * [mediainfo](http://mediainfo.sourceforge.net/) is way slower
+ * Cache computed durations as pagestate
+
+### Other ideas
+
+* Optionally specify the enclosure's:
+ * MIME type, in case `File::MimeInfo` guesses wrong.
+ * Duration, in case `ffprobe` guesses wrong.
+* Optionally specify enclosures outside the wiki:
+ * Some people don't want to store big unchanging files in the VCS.
+ * Other people like [podcasting found media](http://huffduffer.com/about).
+ * We'd have to download the file just to compute some metadata
+ about it, and then somehow not frequently re-download it.
+* Configurably generate additional subscription links (such as
+ iTunes) alongside the RSS/Atom ones in [[plugins/inline]].
+* Support Apple's "enhanced podcasts" (if they're still relevant).