glossary.collection — Name of the glossary collection file
<xsl:param name="glossary.collection">https://cdn.docbook.org/resources/latest/xml/glossary.xml</xsl:param>
Glossaries maintained independently across a set of documents are likely to become inconsistent unless considerable effort is expended to keep them in sync. It makes much more sense, usually, to store all of the glossary entries in a single place and simply “extract” the ones you need in each document.
That's the purpose of the
glossary.collection parameter. To setup a global
glossary “database”, follow these steps:
First, create a stand-alone glossary document that contains all of the entries that you wish to reference. Make sure that each glossary entry has an ID.
Here's an example glossary:
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glossary PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> <glossary> <glossaryinfo> <editor><firstname>Eric</firstname><surname>Raymond</surname></editor> <title>Jargon File 4.2.3 (abridged)</title> <releaseinfo>Just some test data</releaseinfo> </glossaryinfo> <glossdiv><title>0</title> <glossentry> <glossterm>0</glossterm> <glossdef> <para>Numeric zero, as opposed to the letter `O' (the 15th letter of the English alphabet). In their unmodified forms they look a lot alike, and various kluges invented to make them visually distinct have compounded the confusion. If your zero is center-dotted and letter-O is not, or if letter-O looks almost rectangular but zero looks more like an American football stood on end (or the reverse), you're probably looking at a modern character display (though the dotted zero seems to have originated as an option on IBM 3270 controllers). If your zero is slashed but letter-O is not, you're probably looking at an old-style ASCII graphic set descended from the default typewheel on the venerable ASR-33 Teletype (Scandinavians, for whom /O is a letter, curse this arrangement). (Interestingly, the slashed zero long predates computers; Florian Cajori's monumental "A History of Mathematical Notations" notes that it was used in the twelfth and thirteenth centuries.) If letter-O has a slash across it and the zero does not, your display is tuned for a very old convention used at IBM and a few other early mainframe makers (Scandinavians curse <emphasis>this</emphasis> arrangement even more, because it means two of their letters collide). Some Burroughs/Unisys equipment displays a zero with a <emphasis>reversed</emphasis> slash. Old CDC computers rendered letter O as an unbroken oval and 0 as an oval broken at upper right and lower left. And yet another convention common on early line printers left zero unornamented but added a tail or hook to the letter-O so that it resembled an inverted Q or cursive capital letter-O (this was endorsed by a draft ANSI standard for how to draw ASCII characters, but the final standard changed the distinguisher to a tick-mark in the upper-left corner). Are we sufficiently confused yet?</para> </glossdef> </glossentry> <glossentry> <glossterm>1TBS</glossterm> <glossdef> <para role="accidence"> <phrase role="pronounce"></phrase> <phrase role="partsofspeach">n</phrase> </para> <para>The "One True Brace Style"</para> <glossseealso>indent style</glossseealso> </glossdef> </glossentry> <!-- ... --> </glossdiv> <!-- ... --> </glossary>
That takes care of the glossary database, now you have to get the entries
into your document. Unlike bibliography entries, which can be empty, creating
“placeholder” glossary entries would be very tedious. So instead,
support for glossary.collection relies on implicit linking.
In your source document, simply use firstterm and
glossterm to identify the terms you wish to have included
in the glossary. The stylesheets assume that you will either set the
baseform attribute correctly, or that the
content of the element exactly matches a term in your glossary.
If you're using a glossary.collection, don't
make explicit links on the terms in your document.
So, in your document, you might write things like this:
<para>This is dummy text, without any real meaning. The point is simply to reference glossary terms like <glossterm>0</glossterm> and the <firstterm baseform="1TBS">One True Brace Style (1TBS)</firstterm>. The <glossterm>1TBS</glossterm>, as you can probably imagine, is a nearly religious issue.</para>
If you set the firstterm.only.link parameter,
only the terms marked with firstterm will be links.
Otherwise, all the terms will be linked.
The glossary itself has to be identified for the stylesheets. For lack
of a better choice, the role is used.
To identify the glossary as the target for automatic processing, set
the role to “auto”. The title of this
glossary (and any other information from the glossaryinfo
that's rendered by your stylesheet) will be displayed, but the entries will
come from the database.
Unfortunately, the glossary can't be empty, so you must put in
at least one glossentry. The content of this entry
is irrelevant, it will not be rendered:
<glossary role="auto"> <glossentry> <glossterm>Irrelevant</glossterm> <glossdef> <para>If you can see this, the document was processed incorrectly. Use the <parameter>glossary.collection</parameter> parameter.</para> </glossdef> </glossentry> </glossary>
What about glossary divisions? If your glossary database has glossary
divisions and your automatic glossary contains at least
one glossdiv, the automic glossary will have divisions.
If the glossdiv is missing from either location, no divisions
will be rendered.
Glossary entries (and divisions, if appropriate) in the glossary will occur in precisely the order they occur in your database.
Finally, when you are ready to format your document, simply set the
glossary.collection parameter (in either a
customization layer or directly through your processor's interface) to
point to your global glossary.
A relative path in the parameter is interpreted in one of two ways:
If the parameter glossterm.auto.link
is set to zero, then the path is relative to the file containing
the empty glossary element in the document.
If the parameter glossterm.auto.link
is set to non-zero, then the path is relative to the file containing
the first inline glossterm or
firstterm in the document to be linked.
Once the collection file is opened by the first instance described above, it stays open for the current document and the relative path is not reinterpreted again.
The stylesheets will format the glossary in your document as if all of the entries implicilty referenced appeared there literally.
Glossary cross-references within the glossary are not supported. For example, this will not work:
<glossentry> <glossterm>gloss-1</glossterm> <glossdef><para>A description that references <glossterm>gloss-2</glossterm>.</para> <glossseealso>gloss-2</glossseealso> </glossdef> </glossentry>
If you put glossary cross-references in your glossary that way,
you'll get the cryptic error: Warning:
glossary.collection specified, but there are 0 automatic
glossaries.
Instead, you must do two things:
Markup your glossary using glossseealso:
<glossentry> <glossterm>gloss-1</glossterm> <glossdef><para>A description that references <glossterm>gloss-2</glossterm>.</para> <glossseealso>gloss-2</glossseealso> </glossdef> </glossentry>
Make sure there is at least one glossterm reference to
gloss-2 in your document. The
easiest way to do that is probably within a remark in your
automatic glossary:
<glossary role="auto"> <remark>Make sure there's a reference to <glossterm>gloss-2</glossterm>.</remark> <glossentry> <glossterm>Irrelevant</glossterm> <glossdef> <para>If you can see this, the document was processed incorrectly. Use the <parameter>glossary.collection</parameter> parameter.</para> </glossdef> </glossentry> </glossary>