[xml] getElementsByName is available?

["kalyanasundaram s" <s kalyanasundaram gmail com>]

Hi all,
  I need to parse a huge xml file for a specific set of nodes. Is there any method like getElementByName is available in libxml. I could not find it in the document. Does it exists with some other name? 
Otherwise i will have to travel in the entire tree. It is inefficient. 

Thanks for your help.
 -- 
kalyan