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Q: What intrinsic properties do the nodes of an XML document have in
addition to those that are specified in the XML Infoset [1]?
A node (of type element, comment, text, processing instruction and root) of
a XML document has the following properties by it's very nature of being a
tree structure:
1) A parent node (unless it is a root node),
2) Zero or more child nodes (if it is a root or element node),
3) A level number (AKA layer in HTML),
4) A sibling number (based on the position among the node's siblings),
Furthermore, a node also has the following property because it is read
sequentially as a text file:
5) A position in the order processed in the document.
In addition, several specs (XML Infoset [1] and DOM2 Core [2]) hint that a
node can have several properties depending on the type:
6) Type of node
7) Name of node
8) Content of node
9) Attributes (if an Element)
Since nodes may be of different types, I think that there are a few more
properties that may applicable:
10) A sibling number, counting only the same type of node.
11) A position in the order processed in the document, counting only the
same type of node.
12) An XPointer representing the location of the node relative to a fixed
position (I'm going to use the root node).
How complete is that list? Are there any that I'm missing?
I am writing an XML processor as a module for an MathML processor, and I
must create a flexible yet simple DOM for the project. The DOM should
easily support access to those properties that a node has by it's very
nature, methinks.
Besides, I haven't read about a discussion about the properties of a node in
a XML document as related to its data structure.
---
Jimmy Cerra
jc2astro@hotmail.com
(I use another private address for replies to control spam.)
---
"my mind is slipping away ... day by glorious day"
-Robin Gorkin
---
Notes:
[1] http://www.w3.org/TR/xml-infoset/
[2]
http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
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