A9 supports extensions to the OpenSearch specification. The following extensions are available under the namespace http://a9.com/-/opensearch/extensions. OpenSearch Descriptions and feeds that use these extensions should include:
xmlns:a9="http://a9.com/-/opensearch/extensions/"
in their top level tag.
item tag. In an Atom feed, it appears as an attribute of the
entry tag.
a9:counted to false.
false, the item or entry is counted normally.
<item a9:counted="false">...</item>
<entry a9:counted="false">...</entry>
a9:counted extension should indicate so by replacing
{a9:supports-counted?} in the url template with
true. Clients that wish to tailor their output may
include {a9:supports-counted?} in their url
templates.
<Url type="application/rss+xml"
template="http://example.com/?q={searchTerms}& p={startPage}&counted={a9:supports-counted?}"/>