Re: [xml] referencing to parameter entity

[Furucz Janos <jhn freemail hu>]

On 2004-04-03 14.23.27, Daniel Veillard wrote:
> On Sat, Apr 03, 2004 at 02:02:48PM +0200, Furucz Janos wrote:
> [...]
> > I need to create a doc that starts like this:
> > <?xml version="1.0"?>
> > <!DOCTYPE IDMEF-Message PUBLIC "-//IETF//DTD RFC XXXX IDMEF
> v1.0//EN"
> > "/usr/local/share/snort/idmef-message.dtd" [
> > <!ENTITY % x-fwmessage SYSTEM "/usr/local/share/snort/fw-message. 
> dtd">
> > %x-fwmessage;
> > ]>
> > ...
> >
> > I can add the external dtd to the doc as parameter entity with
> > xmlAddDocEntity(doc, FWDTD_NAME, XML_EXTERNAL_PARAMETER_ENTITY,
> NULL,
> > FWDTD_PATH, NULL);
> > function.
> >
> > This function generates this doc:
> > <?xml version="1.0"?>
> > <!DOCTYPE IDMEF-Message PUBLIC "-//IETF//DTD RFC XXXX IDMEF
> v1.0//EN"
> > "/usr/local/share/snort/idmef-message.dtd" [
> > <!ENTITY % x-fwmessage SYSTEM "/usr/local/share/snort/fw-message. 
> dtd">
> > ]>
> > ...
> >
> > My question is, how can I create the "%x-fwmessage;" reference.
> > Sorry about the question if it is trivial, but I'm new in xml.
>
>   Hum, there is an hackish way to do this by adding a text node to  
> the
> DTD children of the document, based on xmlNewText() and xmlAddChild 
> (),
> here is a python based example:
>
> >>> doc = libxml2.parseFile("tst.xml")
> >>> print doc.serialize()
> <?xml version="1.0"?>
> <!DOCTYPE IDMEF-Message PUBLIC "-//IETF//DTD RFC XXXX IDMEF v1.0//EN"
> "/usr/local/share/snort/idmef-message.dtd" [
> <!ENTITY % x-fwmessage SYSTEM "/usr/local/share/snort/fw-message. 
> dtd">
> ]>
> <IDMEF-Message/>
>
> >>> dtd = doc.children
> >>> text = libxml2.newText('%x-fwmessage;\n')
> >>> dtd.addChild(text)
> <xmlNode (text) object at 0x81f7fec>
> >>> print doc.serialize()
> <?xml version="1.0"?>
> <!DOCTYPE IDMEF-Message PUBLIC "-//IETF//DTD RFC XXXX IDMEF v1.0//EN"
> "/usr/local/share/snort/idmef-message.dtd" [
> <!ENTITY % x-fwmessage SYSTEM "/usr/local/share/snort/fw-message. 
> dtd">
> %x-fwmessage;
> ]>
> <IDMEF-Message/>
>
> >>>
>
> Daniel
>
> --
> Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
> veillard redhat com  | libxml GNOME XML XSLT toolkit
> http://xmlsoft.org/
> http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/

Thank you many times

It works in C like this:

void appendFWDtd(xmlDocPtr doc) {
        
        xmlEntityPtr fwdtdptr;
        xmlNodePtr docchildptr, fwreftextptr;
        
        fwdtdptr = xmlAddDocEntity(doc,
                FWDTD_NAME,
                XML_EXTERNAL_PARAMETER_ENTITY,
                NULL,
                FWDTD_PATH,
                NULL);

        fwreftextptr = xmlNewText((xmlChar *) FWDTD_REF);
        docchildptr = doc->children;
        xmlAddChild(docchildptr, fwreftextptr);
}

JOhn,
jhn freemail hu