3 Linking within SGML documents can be confusing, so here is a summary:
10 used to link to a section without supplying text for the link;
11 text comes from the link target; has no close tag
12 http://www.oasis-open.org/docbook/documentation/reference/html/xref.html
15 allows link text to be supplied, requires </link>
16 http://www.oasis-open.org/docbook/documentation/reference/html/link.html
20 controls the target of the link/xref
23 allows the text of the link/xref to be taken from a different
24 link target; endterm in a <link> overrides the supplied text
32 like <link>, but uses a URL (not a document target); requires
33 </ulink>; if no text is specified, the URL appears as the link text
34 http://www.oasis-open.org/docbook/documentation/reference/html/ulink.html
37 used by <ulink> to specify the URL
43 o Do not use endterm with <link> because the supplied text is ignored; use
45 o Do not use text with <ulink> so the URL appears in printed output