On Tue, 2006-11-28 at 16:57 -0800, Yan Seiner wrote: > Fist off, I'm a total newbie when it comes to libxml. I've been able to > work my way through some examples, and produce working code, but I'm not > entirely happy with the result, and I would like some advice. > > I have an XML tree that looks like this: > > <root> > <plc id="1"> > <some stuff/> > </plc> > <plc id="2"> > <some other stuff/> > </plc> > </root> > > I have a relatively small number (< 50) of the plc nodes, but the whole > tree is pretty big. > > What is the best (or simplest way) to retrieve the information for plc 2?
xpath is the simplest and most powerful > Should I pull all of the plc elements using xmlXPathEvalExpression, and > then iterate over them with xmlGetProp looking for an id attribute with > a value of "2"? no need to iterate, just create an xpath expression which specifies id=2 off the top of my head the expression would be "/[EMAIL PROTECTED]"2"]" just google xpath syntax or xpath examples, you'll turn up a ton libxml2 xpath example C code here: http://xmlsoft.org/examples/index.html#XPath The xpath spec has examples too: http://www.w3.org/TR/xpath If you're comfortable with python or another scripting language you can construct a simple test program to exercise your xpath syntax in about 5 minutes. -- John Dennis <[EMAIL PROTECTED]>
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