olink

Processing expectations

Formatted inline.

OLink points to its target primarily with the TargetDocEnt attribute. TargetDocEnt must be the name of an entity (previously declared in the DTD or in the document subset).

Because TargetDocEnt is an entity attribute, the entity used as its value must be declared with a notation. Because the target is usually another SGML or XML document, the notation SGML is most often used:

<!ENTITY myotherdoc SYSTEM "myotherdoc.sgm" NDATA SGML>

The semantics of the link are controlled by three other attributes: LinkMode, LocalInfo, and Type. The LinkMode attribute points to a ModeSpec. The content of ModeSpec describes the semantic of the link in an entirely application-specific way.

The values of LocalInfo and Type may also influence the application. For example, if the ModeSpec describes some sort of query, LocalInfo might hold the query text (allowing multiple OLinks to use the same ModeSpec to achieve different queries with the same query engine).

Linking elements must not be nested within other linking elements (including themselves). Because DocBook is harmonizing towards XML, this restriction cannot easily be enforced by the DTD. The processing of nested linking elements is undefined.

Future Changes

The InterfaceDefinition element will be discarded in DocBook V4.0. It will no longer be available in the content model of this element.

Parents

These elements contain olink: abbrev, ackno, acronym, action, application, artpagenums, attribution, authorinitials, bibliocoverage, biblioid, bibliomisc, bibliorelation, bibliosource, bridgehead, citation, citebiblioid, citetitle, city, classsynopsisinfo, code, collabname, command, computeroutput, confdates, confnum, confsponsor, conftitle, contractnum, contractsponsor, contrib, corpauthor, corpcredit, corpname, country, database, date, edition, email, emphasis, entry, fax, figure, filename, firstname, firstterm, foreignphrase, funcparams, funcsynopsisinfo, function, glosssee, glossseealso, glossterm, hardware, holder, honorific, indexdiv, informalfigure, interfacename, invpartnumber, isbn, issn, issuenum, jobtitle, keycap, label, lineage, lineannotation, link, literal, literallayout, lotentry, manvolnum, member, modespec, msgaud, olink, option, optional, orgdiv, orgname, otheraddr, othername, pagenums, para, parameter, phone, phrase, pob, postcode, primary, primaryie, productname, productnumber, programlisting, property, pubdate, publishername, pubsnumber, quote, refentry, refentrytitle, refmiscinfo, refnamediv, refpurpose, releaseinfo, remark, replaceable, revnumber, revremark, screen, screeninfo, secondary, secondaryie, see, seealso, seealsoie, seeie, seg, segtitle, seriesvolnums, shortaffil, simpara, state, street, subscript, subtitle, superscript, surname, synopsis, systemitem, td, term, tertiary, tertiaryie, th, title, titleabbrev, tocback, tocentry, tocfront, trademark, ulink, userinput, volumenum, wordasword, year.

Children

The following elements occur in olink: abbrev, acronym, action, anchor, application, author, authorinitials, beginpage, citation, citerefentry, citetitle, classname, classsynopsis, cmdsynopsis, code, command, computeroutput, constant, constructorsynopsis, corpauthor, corpcredit, database, destructorsynopsis, email, emphasis, envar, errorcode, errorname, errortext, errortype, exceptionname, fieldsynopsis, filename, firstterm, footnote, footnoteref, foreignphrase, funcsynopsis, function, glossterm, guibutton, guiicon, guilabel, guimenu, guimenuitem, guisubmenu, hardware, indexterm, inlineequation, inlinegraphic, inlinemediaobject, interface, interfacename, keycap, keycode, keycombo, keysym, link, literal, markup, medialabel, menuchoice, methodname, methodsynopsis, modespec, mousebutton, nonterminal, olink, ooclass, ooexception, oointerface, option, optional, orgname, othercredit, parameter, personname, phrase, productname, productnumber, prompt, property, quote, remark, replaceable, returnvalue, revhistory, sgmltag, structfield, structname, subscript, superscript, symbol, synopsis, systemitem, token, trademark, type, ulink, uri, userinput, varname, wordasword, xref.

linkmode

LinkMode points to the ModeSpec which provides additional application-specific information for resolving this OLink.

localinfo

LocalInfo hold additional information that may be used with the ModeSpec (pointed to by LinkMode) by the application when resolving this OLink.

targetdocent

TargetDocEnt specifies the name of an entity that is to be used as part of the OLink. Exactly how the link is resolved is application dependent and may be influenced by the MoreInfo and LocalInfo attributes.

type

Type is available for application-specific customization of the linking behavior.

<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
                  "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
<!ENTITY refbook SYSTEM "refbook.sgm" NDATA SGML>
]>
<chapter>
<chapterinfo>
  <modespec id="s1query">query in sect*, title return link text title</modespec>
</chapterinfo>
<title>Printing</title>

<para>
Blah, blah, blah.
</para>

<sect1><title>See Also</title>
<para>
For more information <olink targetdocent="refbook" linkmode="s1query"
localinfo="print or printing">about printing</olink>, consult
the <ulink url="refbook.sgm">reference manual</ulink>.
</para>
</sect1>

</chapter>