Hi, I am totally new to this list - so it�s my first question: I would like to implement a function that calculates the crc32 of a subtree, like <crc32> <data1>here is the data</data1> <data1>here is the data</data1> </crc32> or <crc32 tree="/frame"/> So, where should I implement this? Maybe where the XPath- functions are implemented (like sum()) ? regards, thomas
