Re: Generating an XML DOM tree from scratch withXML/Ada 2013

[Marc C <mc.provisional@gmail.com>]

On Friday, March 21, 2014 11:12:11 AM UTC-5, J Kimball wrote:
> I have done this. The organization and documentation of XML is perplexing and I've also spent hours banging my head against a wall trying to use namespaces and validation.

I appreciate the effort on your part, but it didn't address my problem of programmatically creating an XML document from scratch.

Fortunately I figured out how to go about it, by sorta abusing some of the XML/Ada services (in the following code fragments the withs and uses are omitted, and suitable variable declarations are presumed):

You have to have a DOM_Implementation variable, such as DOM_Impl. Don't worry about getting it or initializing it. Merely declaring it is sufficient.

  DOM_Impl : DOM.Core.DOM_Implementation;

Create a document:

   Doc := Create_Document(DOM_Impl);

Create the root element with its namespace reference:

   Root_Element := Create_Element_NS(Doc, "myNS",
                                          "myNS:rootElement");

Abuse the set attribute service:

   Elements.Set_Attribute_NS
       (Root_Element,
        "xmlns",
        "xmlns:myNS",
        "http://path-to-namespace/more/and/more");

And from this point on you can build the document using Create_Element_NS, Append_Child, etc. to your heart's content.

Marc