You can search for identifiers within the package.
in-package search v0.2.0
pure-html
Pure_html.RSS
RSS support
val domain : _ string_attr
val length : int to_attr
val path : _ string_attr
val port : int to_attr
val protocol : _ string_attr
val register_procedure : _ string_attr
val type_ : _ string_attr
val url_ : _ string_attr
val version_2 : attr
val author : _ text_tag
val channel : std_tag
val category : _ text_tag
val cloud : void_tag
val comments : _ text_tag
val copyright : _ text_tag
val description : _ text_tag
val docs : _ text_tag
val enclosure : std_tag
val generator : _ text_tag
val guid : _ text_tag
val height : _ text_tag
val image : std_tag
val item : std_tag
val language : _ text_tag
val last_build_date : _ text_tag
val link : _ text_tag
val managing_editor : _ text_tag
val pub_date : _ text_tag
val rss : std_tag
val title : _ text_tag
val ttl : _ text_tag
val url : _ text_tag
val web_master : _ text_tag
val width : _ text_tag