3 Linking within SGML documents can be confusing, so here is a summary:
10 use to get link text from the title of the target link; has no
12 http://www.oasis-open.org/docbook/documentation/reference/html/xref.html
15 use to supply text for the link, requires </link>
16 http://www.oasis-open.org/docbook/documentation/reference/html/link.html
19 controls the target of the link/xref, required
22 for <xref>, allows the text of the link/xref to be taken from a
23 different link target title
30 like <link>, but uses a URL (not a document target); requires
31 </ulink>; if no text is specified, the URL appears as the link text
32 http://www.oasis-open.org/docbook/documentation/reference/html/ulink.html
35 used by <ulink> to specify the URL, required
41 o If you want to supply text, use <link>, else <xref>
42 o Do not use text with <ulink> so the URL appears in printed output
43 o You can supply text at the target location with 'xreflabel'