Implement writeTreeDTD()

[galou]

Add <?xml-model href="tree.dtd" type="application/xml-dtd"?> or <!DOCTYPE root SYSTEM "tree.dtd"> to use the benefits of DTD.

[galou]

I'm actually not sure whether <include/> is allowed within <TreeNodesModel/> or <BehaviorTree/>.

[galou]

What about <SubTree/> within <TreeNodesModel/>? If they are accepted, I have the issue that DTD is not powerful enough to describe differently a <SubTree/> within <root/> and within <TreeNodesModel/> (I don't know much about DTD).

[galou]

@facontidavide what is blocking merging?

[facontidavide]

Could you build an example showing how this works in the folder examples?
Something like ex06_something_something.cpp

I'm actually not sure whether is allowed within or

It is not

What about within ? If they are accepted, I have the issue that DTD is not powerful enough to describe differently a within and within (I don't know much about DTD).

It is now. Look at example ex05_subtree_model