Understanding Basic Structure of an XML DOM Based Module
- (Document Object model) will allow the access to information that is stored
in a XML document in the form of hierarchical object model. DOM actually creates
something like a tree of nodes that is based on the structure and information
in a XML document which inturn can access information by interacting with the
tree of nodes. Later, the textual information in XML document gets turned into
a bunch of tree nodes.
of whether it is tabular data or documents or just list of items, the type of
information in a XML document creates a tree of nodes. Since XML is hierarchical
in nature, it forces to use a tree model to access the information even the information
is tabular or listed.
some kind of pure data is been contained in a XML document the it will be very
appropriate to lump all the required data in just one string and then have the
DOM return that particular string value of a given element node. The general lsequence
of elements always play an mportant role in documents.
So, DOM always used
to preserve the sequence of elements from XML documents as it accepts everything
as a document, like a word or FrameMaker document. DOM is really not a very good
object model to be used for storing information stored in xml document and can
be used only when xml documents contain only document data.
is the DataChannel RIO product, which can index and organize information that
comes from all kinds of data sources. DOM allows access to information stored
in these documents.
role of application during an event based parsing, the main focus of the activity
in a DOM based application is post parsing.
The basic layout of an XML
module using DOM is as follows:
-------------- 0 DOM_Node
these 3 basic steps for creating a ML module :
first create & then register handlers for the errors and other implementations
then create a DOM manipulator which will take the responsibility (a) to issue
parsing requests to the parser and (b) to manipulate results made by such requests.
finally, include all the required manipulators for rest of the application interactions.
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