Re: [xml] Deleting unused internal entities

[Daniel Veillard <veillard redhat com>]

On Wed, Dec 23, 2009 at 05:04:16PM -0800, Dustin Voss wrote:
> Hello. I am creating a tree with a number of internal entity definitions and I am using the XML_PARSE_NOENT 
> option. The resulting document has an internal subset that defines these entities, but they are never used 
> in the actual document.
  okay

> What's the best way to remove those unnecessary definitions? I do not want to remove the entire internal 
> subset, because there may be external entities defined there.

  The doc should have a dtd node and the internal entities definitions
withh be carried as child of this dtd node.

> Is it enough to delete nodes from xmlDoc->intSubset->children, or do I have to remove the entities from the 
> xmlDoc->intSubset->entities hash table as well? Will xmlDoc->intSubset->next have anything of interest?

  Hum, yes you would still have entities 

> To delete nodes, I don't see an xmlDeleteNode function, but I do see xmlReplaceNode. Can I pass in NULL for 
> the "cur" parameter?

  xmlUnlinkNode + xmlDeleteNode is the traditional way

> To access the entity hash table, can I just cast xmlDoc->intSubset->entities to xmlHashTablePtr and call 
> xmlHashRemoveEntry? What should I pass for the "f" parameter?

  Hum, that should not be needed as the value put in the hash table is
the entity node.

Daniel

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