2.2.3 [HTML] Section 6.12, Link types
C0006:
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White space characters are not permitted within link types.
All Document Modes (All Versions)
White space characters are preserved in %LinkTypes (such as rel and rev), within anchors, and within LINK elements.
C0007:
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Link types Next Refers to the next document in a linear sequence of documents. User agents may choose to preload the "next" document, to reduce the perceived load time.
All Document Modes (All Versions)
A link type of Next is not interpreted as a reference to the next document in a linear sequence of documents. The preloading of a "next" document is not supported.
C0008:
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Link types
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Prev Refers to the previous document in an ordered series of documents. Some user agents also support the synonym "Previous".
All Document Modes (All Versions)
A link type of Prev (or the synonym "Previous") is not interpreted as a reference to the previous document in a linear sequence of documents. The pre-loading of a "prev" document is not supported.
C0009:
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Link types Contents Refers to a document serving as a table of contents. Some user agents also support the synonym ToC (from "Table of Contents").
All Document Modes (All Versions)
A link type of Contents (or the synonym "ToC") is not interpreted as a reference to a document that serves as the table of contents for a linear sequence of documents.