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<!-- doc/src/sgml/README.links -->
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Linking within SGML documents can be confusing, so here is a summary:
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use to get link text from the title of the target link; has no
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http://www.oasis-open.org/docbook/documentation/reference/html/xref.html
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use to supply text for the link, requires </link>
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http://www.oasis-open.org/docbook/documentation/reference/html/link.html
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controls the target of the link/xref, required
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for <xref>, allows the text of the link/xref to be taken from a
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different link target title
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like <link>, but uses a URL (not a document target); requires
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</ulink>; if no text is specified, the URL appears as the link text
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http://www.oasis-open.org/docbook/documentation/reference/html/ulink.html
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used by <ulink> to specify the URL, required
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o If you want to supply text, use <link>, else <xref>
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o Do not use text with <ulink> so the URL appears in printed output
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o You can supply text at the target location with 'xreflabel'