This appendix describes how to install the DocBook DTD on your system so that popular command-line tools like SP can use it. If you are installing DocBook for use with a commercial application, consult the documentation for your application as well.
This appendix describes the installation of DocBook V3.1. If you are using another distribution, the process should be about the same, but there may be minor differences. DocBook V3.1 is backward compatible with DocBook V3.0, and is the recommended distribution at the time of this writing.
||Describes the changes in DocBook V3.1 from the preceding version (3.0)|
||Summarizes backwards-incompatible changes planned for DocBook V4.0|
||Summarizes backwards-incompatible changes planned for DocBook V5.0|
||The CALS Table Model DTD|
||A GNU-style ChangeLog summarizing the individual edits made on each file in the distribution since V3.0.|
||The character entity module|
||The general entity module|
||The document hierarchy module|
||The notations module|
||The information pool module|
||A sample OASIS catalog for DocBook|
||An SGML Declaration suitable for DocBook|
||The DocBook DTD|
||The DocBook V3.1 “readme” file|
Unpack the distribution into a directory on your system. The exact location
is irrelevant. On UNIX systems it's common to put it somewhere under
/share (for example,
On a PC, perhaps
DocBook refers to a number of standard entity sets that are not distributed with DocBook. (They aren't distributed with DocBook because they aren't maintained by the DocBook TC. They're maintained by ISO.) If you've installed other SGML DTDs or tools, they may already be on your system.
If you are missing some of them, they are available from Robin Cover's pages at OASIS: http://www.oasis-open.org/cover/ISOEnts.zip. See http://www.oasis-open.org/cover/topics.html#entities for more information.
DocBook uses public identifiers to refer to its
constituent parts. In some sense, DocBook is
DocBook because it has the formal public
-//OASIS//DTD DocBook V3.1//EN”.
In order for tools on your system to
find your locally installed copy of DocBook, you must map these
public identifiers into system identifiers, i.e., filenames, on
your system. For a complete discussion of catalog files,
see the section called “Public Identifiers, System Identifiers, and Catalog Files”.
The DocBook distribution includes a sample catalog,
, which provides a mapping for all of the public identifiers referenced
by DocBook. This mapping won't work “out of the box” for two
reasons: first, your tools won't be able to find it, and second, the mappings
for the ISO entity sets probably don't point to the right place on your system.
If you've already got some other SGML DTDs installed, you probably already have a catalog file. In this case, the easiest thing to do is append the DocBook catalog entries to the end of your existing catalog and then change them to point to the files on your system.
If DocBook is the first DTD that you're installing, make a
docbook.cat and call it
catalog. Put this file in a higher-level
directory and edit the relative pathnames that it contains to point to
the actual locations of the files on your system. For example, if you installed DocBook
/share/sgml/docbk30/, put the
In order for applications to find your catalog file(s), you may have
to change the application preferences or set an environment variable. For
SP and Jade, set the environment
SGML_CATALOG_FILES to the delimited list of catalog
filenames. On my system, this looks like:
(On a UNIX machine, use colons instead of semicolons to delimit the filenames.)
If you don't wish to set the environment variable, you can explicitly
pass the name of each catalog to the SP application
-c option, like this:
nsgmls -c ./catalog -c n:/share/sgml/catalog
PUBLIC "some public id" "some filename"
What you have to do is change each of the “some filenames” to point to the actual name of the file on your system.
To continue with the example above, let's say that you've got:
The ISO entities in
Your catalog in
Then you would change the catalog entry for the DTD to be:
PUBLIC "-//OASIS//DTD DocBook V3.1//EN" "docbk30/docbook.dtd"
You would change the catalog entry for the general technical character entities to:
PUBLIC "ISO 8879:1986//ENTITIES General Technical//EN" "entities/8879/iso-tech.gml"
And similarly for the other public identifiers used by DocBook. In each
case, the filename specified for the public identifier should be the name
of the file on your system, specified as an absolute filename, or
relative to the location of the
in which it occurs.
Since XML documents are required to have system identifiers, but are not required to have public identifiers, it's likely that some of the documents you want to process will only have system identifiers.
It turns out that you can still take advantage of the catalog in this case.
SYSTEM directive allows you to map the system
identifier used in the document to the actual location on your system.
Suppose that you work with a colleague who uses the system identifier “file:///c:/sgml/db3xml/db3xml.dtd” to identify the XML version of DocBook on her system. On your system, you want to map that to “/share/sgml/db3xml/db3xml.dtd”. The following entry in your catalog will do the trick:
SYSTEM "http://docbook.org/docbook/xml/1.4/db3xml.dtd" "/share/sgml/db3xml/db3xml.dtd"
Unfortunately, this technique only works with applications that read and understand catalog files.
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook V3.1//EN"> <chapter><title>Test Chapter</title> <para> This is a test document. </para> </chapter>
and run the following command:
nsgmls -sv test.sgm
If the nsgmls command produces errors, review your
catalog and resolve the errors. You can ignore warnings about
being unsupported. It is unsupported, and there's no way to disable
the warning message. Note, however, that this may also affect which SGML declaration
gets used. When in doubt, pass the correct declaration explicitly and see
if that corrects any problems. (To parse
docbook.dcl explicitly, run
nsgmls -sv docbook.dcl test.sgm.)
For some suggestions about how to work around these problems in SP and Jade, see the next section, the section called “Installing Jade”.
For simplicity, the instructions assume that you are working with Jade on a Microsoft Windows machine. These instructions should be just as useful if you are working on another platform, except for the normal cross-platform idiosyncracies (path and filename separator characters, use of drive letters, etc.).
Download and unpack the Jade distribution. Binary distributions are available for some platforms, which makes installation a simple matter of unpacking the distribution. Or you can build Jade from the source (consult the documentation that comes with Jade for more detail about building it from source).
You may wish to add the directory where you installed Jade to your
PATH. If not, make sure that you use the fully qualified name of the
executable when you run the commands below.
First, the catalog needs to be set up as described in
the section called “The DocBook Catalog”
in order for Jade to be able to parse your DocBook documents. In addition,
Jade comes with its own
catalog file that you must add
SGML_CATALOG_FILES environment variable or otherwise
make available to Jade.
jade -t rtf -d jtest.dsl jtest.sgm
This command should silently produce jtest.rtf. If you encounter warnings or errors here, Jade is not installed correctly. One possible culprit is your catalog setup. See the section called “Dealing with Multiple Declarations”.
One annoying shortcoming in Jade is that it does not support the
DTDDECL catalog directive and it complains loudly if it encounters
one. In Jade, it's almost always possible to work around the problems that
DTDDECL would solve, so you can generally ignore the warnings.
If you also use applications that do understand
and find the warnings too distracting to bear, setup alternate catalogs
for SP applications,
that are identical to your normal catalogs but do not contain any
DTDDECL entries. You can then avoid the warnings by putting
SGML_CATALOG_FILES path, instead of
Norman Walsh (one of your intrepid authors ;-) maintains two DSSSL stylesheets for DocBook, one for print and one for online (HTML) output. You can obtain both of these stylesheets from http://nwalsh.com/docbook/dsssl/ . (A recent version is also on the CD-ROM.)
If you have not already done so, download and install the DocBook DTD as described in the section called “Installing the DocBook DTD”.
Likewise, if Jade is not installed on your system, download and install it as described in the section called “Installing Jade”.
Download and unpack the stylesheet distribution.
jade -t rtf -d d:\where-you-unpacked-the-stylesheets\docbook\print\docbook.dsl test.sgm
To test the HTML stylesheet, run:
jade -t sgml -d d:\where-you-unpacked-the-stylesheets\docbook\html\docbook.dsl test.sgm
 The names of the entity files in this distribution do not
exactly match the names of the files used in the catalog file
distributed with DocBook (
docbook.cat). Make sure your
catalog file points to the right files.