The DASL response header indicates server support for query grammars in the OPTIONS method. The value is a list of URIs that indicate the types of supported grammars. Note that although the URIs can be used to identify each supported search grammar, there is not necessarily a direct relationship between the URI and the XML element name that can be used in XML based SEARCH requests (the element name itself is identified by its namespace name (a URI reference) and the element’s local name). (RFC 5323: Web Distributed Authoring and Versioning (WebDAV) SEARCH)


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