Implicit hyperlinks are hyperlinks created implicitly by various Eplain macros, such as the macros for citations, cross-references, indexing, etc.
All such macros are divided into link groups and destination groups (or linkgroups and destgroups for short) so that parameters can be set individually for each group. For example, all equation macros which define a destination are assigned to the `eq' destgroup; equation macros which create a link are assigned to the `eq' linkgroup. By setting parameters for the `eq' linkgroup (destgroup), you can uniformly customize all links (destinations) related to equation references, without interfering with settings for the other groups.
See Setting hyperlink types and options, for information on how to set parameters for a group.
Here is the list of the linkgroups:
hrefint, hrefext, url, cite, ref, xref, eq, idx, foot, footback.
And here are the destgroups:
bib, li, definexref, xrdef, eq, idx, foot, footback.
See Hyperlinks (xhyper.tex), for a demonstration of the usage of implicit hyperlinks.
The following subsections describe each of the linkgroups and destgroups and the hyperlink support provided.