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diff --git a/ikiwiki/pagespec/attachment.mdwn b/ikiwiki/pagespec/attachment.mdwn
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+[[!meta robots="noindex, follow"]]
+[[!if test="enabled(attachment)"
+     then="This wiki has attachments **enabled**."
+     else="This wiki has attachments **disabled**."]]
+
+If attachments are enabled, the wiki admin can control what types of
+attachments will be accepted, via the `allowed_attachments`
+configuration setting.
+
+For example, to limit most users to uploading small images, and nothing else,
+while allowing larger mp3 files to be uploaded by joey into a specific
+directory, and check all attachments for viruses, something like this could be
+used:
+  
+	virusfree() and ((user(joey) and podcast/*.mp3 and mimetype(audio/mpeg) and maxsize(15mb)) or (mimetype(image/*) and maxsize(50kb)))
+
+The regular [[ikiwiki/PageSpec]] syntax is expanded with the following
+additional tests:
+
+* "`maxsize(size)`" - tests whether the attachment is no larger than the
+  specified size. The size defaults to being in bytes, but "kb", "mb", "gb"
+  etc can be used to specify the units.
+  
+* "`minsize(size)`" - tests whether the attachment is no smaller than the
+  specified size.
+
+* "`ispage()`" - tests whether the attachment will be treated by ikiwiki as a
+  wiki page. (Ie, if it has an extension of ".mdwn", or of any other enabled
+  page format).
+
+  So, if you don't want to allow wiki pages to be uploaded as attachments,
+  use `!ispage()` ; if you only want to allow wiki pages to be uploaded
+  as attachments, use `ispage()`.
+
+* "`mimetype(foo/bar)`" - checks the MIME type of the attachment. You can
+  include a glob in the type, for example `mimetype(image/*)`.
+
+* "`virusfree()`" - checks the attachment with an antiviral program.
diff --git a/ikiwiki/pagespec/po.mdwn b/ikiwiki/pagespec/po.mdwn
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+[[!if test="enabled(po)"
+     then="This wiki has po support **enabled**."
+     else="This wiki has po support **disabled**."]]
+
+If the [[!iki plugins/po desc=po]] plugin is enabled, the regular
+[[ikiwiki/PageSpec]] syntax is expanded with the following additional
+tests that can be used to improve user navigation in a multi-lingual
+wiki:
+
+* "`lang(LL)`" - tests whether a page is written in the language
+  specified as a ISO639-1 (two-letter) language code.
+* "`currentlang()`" - tests whether a page is written in the same
+  language as the current page.
+* "`needstranslation()`" - tests whether a page needs translation
+  work. Only slave pages match this PageSpec. A minimum target
+  translation percentage can optionally be passed as an integer
+  parameter: "`needstranslation(50)`" matches only pages less than 50%
+  translated.
+
+Note that every non-po page is considered to be written in
+`po_master_language`, as specified in `ikiwiki.setup`.
+
+[[!meta robots="noindex, follow"]]
diff --git a/ikiwiki/pagespec/sorting.mdwn b/ikiwiki/pagespec/sorting.mdwn
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+Some [[directives|ikiwiki/directive]] that use
+[[PageSpecs|ikiwiki/pagespec]] allow
+specifying the order that matching pages are shown in. The following sort
+orders can be specified.
+
+* `age` - List pages from the most recently created to the oldest.
+
+* `mtime` - List pages with the most recently modified first.
+
+* `title` - Order by title (page name).
+[[!if test="enabled(sortnaturally)" then="""
+* `title_natural` - Orders by title, but numbers in the title are treated
+  as such, ("1 2 9 10 20" instead of "1 10 2 20 9")
+"""]]
+[[!if test="enabled(meta)" then="""
+* `meta(title)` - Order according to the `\[[!meta title="foo" sortas="bar"]]`
+  or `\[[!meta title="foo"]]` [[ikiwiki/directive]], or the page name if no
+  full title was set. `meta(author)`, `meta(date)`, `meta(updated)`, etc.
+  also work.
+"""]]
+
+In addition, you can combine several sort orders and/or reverse the order of
+sorting, with a string like `age -title` (which would sort by age, then by
+title in reverse order if two pages have the same age).
+
+[[!meta robots="noindex, follow"]]