html.head.legalnotice.link.types — Specifies link types for legalnotice link in html head
The value of
html.head.legalnotice.link.types is a
space-separated list of link types, as described in Section 6.12
of the HTML 4.01 specification. If the value of the
generate.legalnotice.link parameter is
non-zero, then the stylesheet generates (in the
head section of the HTML source) either a single
HTML link element or, if the value of the
html.head.legalnotice.link.multiple is
non-zero, one link element for each link type
specified. Each link has the following attributes:
a rel attribute whose
    value is derived from the value of
    html.head.legalnotice.link.types
an href attribute whose
    value is set to the URL of the file containing the
    legalnotice
a title attribute whose
    value is set to the title of the corresponding
    legalnotice (or a title programatically
    determined by the stylesheet)
For example:
<link rel="license" href="ln-id2524073.html" title="Legal Notice">
In an ideal world, the default value of
  html.head.legalnotice.link.types would
  probably be “license”, since the content of the
  DocBook legalnotice is typically license
  information, not copyright information. However, the default value
  is “copyright” for pragmatic reasons: because
  that’s among the set of “recognized link types” listed in Section
  6.12 of the HTML 4.01 specification, and because certain
  browsers and browser extensions are preconfigured to recognize that
  value.