DOCBOOK: Re: SDATA-Warnings

[Karl Eichwalder <keichwa at gmx dot net>]

Holger Rauch <Holger.Rauch@heitec.de> writes:

> When I convert an SGML file to an XML file using "sgml2xml" (part of the
> SP package) I get the following warnings:

sgml2xml is the old command 'sx' renamed (to avoid name space problems
with the 'rzsz' package).

> sgml2xml:evaluation_textverarbeitungssysteme.sgml:803:17:W: reference to
> internal SDATA entity "ndash" not allowed in XML
> sgml2xml:evaluation_textverarbeitungssysteme.sgml:803:36:W: reference to
> internal SDATA entity "ndash" not allowed in XML
> sgml2xml:evaluation_textverarbeitungssysteme.sgml:935:23:W: reference to
> internal SDATA entity "mdash" not allowed in XML
> sgml2xml:evaluation_textverarbeitungssysteme.sgml:1209:1:W: reference to
> internal SDATA entity "mdash" not allowed in XML
> sgml2xml:evaluation_textverarbeitungssysteme.sgml:1210:25:W: reference to
> internal SDATA entity "mdash" not allowed in XML
> sgml2xml:evaluation_textverarbeitungssysteme.sgml:1413:48:W: reference to
> internal SDATA entity "lt" not allowed in XML
> sgml2xml:evaluation_textverarbeitungssysteme.sgml:1413:66:W: reference to
> internal SDATA entity "gt" not allowed in XML
> 
> What is an "SDATA entity"?

Specific character data (IIRC).

> What notation do I have to use in XML instead
> of "&lt;", "&gt;", "&ndash;", "&mdash;"?

The simpliest is to use Unicode character mappings coming with the XML
version of DocBook (on SuSE Linux available as
/usr/share/sgml/db41xml/ent/*.ent).

After running sgml2xml adjust the DOCTYPE declaration and it should be a
valid document; db2x.sh (the version coming with SuSE Linux 7.1) is
considered to "convert" from SGML to XML using the --xml switch -- I
admit this switch isn't that much tested (please report problems to me).

-- 
work : ke@suse.de                          |                   ,__o
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