Hi All! How i can validate a attribute for only numeric or only string, because all attributes are designed for be properties (attributes) of the node, in this case the attribute Left,top,width,height only could be numeric. How i can tell in xml this?

i try to convert a class to xml then the attribute of the class form like left ,width,top i need be numeric por performance reason.

can be?

any help is appreciated

Best regards

Francisco Morosini