Data verification in an XML document.

[Joseph Nolting]

Hi,

I'm new to XML and I am working on a project where I need to verify
some of the data in the XML document. The tests I will need to verify
include: if a certain element exists then this element must exist, or
whether or not a certain attribute exists and has a value, or simply
if an element contains text content. My question is, what is the best
method to go about performing these verifications? Using a schema,
DTD, XSLT, or some other method?

Thank you,

Joseph Nolting

 

[Patrick TJ McPhee]

% some of the data in the XML document. The tests I will need to verify
% include: if a certain element exists then this element must exist, or
% whether or not a certain attribute exists and has a value, or simply
% if an element contains text content.

Schema was made for these kinds of test. Actually, except for ensuring
an element has text content, you could do it with a DTD as well.
To ensure one element exists when another does, you either have to
ensure that they are adjacent or do a lot of typing.