Re: [xml] DOM Parser + entities

[Daniel Veillard <veillard redhat com>]

On Wed, Oct 15, 2003 at 04:41:06PM +0200, Murray Cumming Comneon com wrote:
> I'm using the DOM Parser, with replaceEntities=0 in the parser context, so
> that the entity references appear in the tree instead of being resolved
> automatically to text.
>
> The entity reference node types are XML_ENTITY_REF_NODE, and, from looking
> at the source code, the nodes seem to be plain xmlNodes and don't need to be
> casted to any other struct type.
>
> So, 2 questions:
> 1. What useful things can I discover about this node other than the name?
> Maybe nothing. I'm clueless.

  Well an entity REF points though content to an entity DECL,
see xmlEntityPtr / struct _xmlEntity , after the usual navigation
fields you will find

    xmlChar                *orig;       /* content without ref substitution */
    xmlChar             *content;       /* content or ndata if unparsed */
    int                   length;       /* the content length */
    xmlEntityType          etype;       /* The entity type */
    const xmlChar    *ExternalID;       /* External identifier for PUBLIC */
    const xmlChar      *SystemID;       /* URI for a SYSTEM or PUBLIC Entity */
                                                                                
    struct _xmlEntity     *nexte;       /* unused */
    const xmlChar           *URI;       /* the full URI as computed */
    int                    owner;       /* does the entity own the childrens */

  that's a lot of informations about the entity.

> 2. I notice that these Entity Reference nodes have children. The child node
> types are XML_ENTITY_DECL, but I can't see any logic to it. Are these child
> nodes useful/meaningful.

  Multiple entity ref can point to the same declaration
a declaration is the equivalent to <!ENTITY in the DTD.

Daniel

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