DOCBOOK: Re: Invisible tech symbols

[Norman Walsh <ndw@nwalsh.com>]

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/ Tomek Kaczanowski <tkaczano@mops.uci.agh.edu.pl> was heard to say:
| I'm new to DocBook, and I have problem with tech symbols. I have a
| file like this:
|
| <?xml version='1.0' encoding='ISO-8859-2'?>
| <!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
| "file://c:\docbook\dtd\docbookx.dtd" [
| <!ENTITY % ISOtech PUBLIC "ISO 8879:1986//ENTITIES General Technical//EN"
|  "file://c:\docbook\dtd\ent\iso-tech.ent">
| ]>
| ...
| ...
| <para>&forall; &and; &cap; &infin;</para>
| ...
|
| The file is well-formed and valid, it produces nice .html and .pdf but
| some symbols ("forall" and "and") are invisible (pdf) or look like
| small squares (html). Why is it so and how can I fix it ?

It's an unfortunate rendering/font problem. The only truly portable
solution for HTML is probably to resort to graphics. For PDF, you
might be able to find a font that includes those symbols.

- From the DocBook perspective, the entities indicate that you want a
particular symobl. But it's up to the rendering mechanism to actually
produce the right thing.

                                        Be seeing you,
                                          norm

- -- 
Norman Walsh <ndw@nwalsh.com>      | Some books are undeservedly
http://www.oasis-open.org/docbook/ | forgotten, non are undeservedly
Chair, DocBook Technical Committee | remembered.--W. H. Auden
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