<!-- include start from pppoe-access-concentrator.xml.i --> <leafNode name="access-concentrator"> <properties> <help>Access concentrator name</help> <constraint> #include <include/constraint/alpha-numeric-hyphen-underscore.xml.i> </constraint> <constraintErrorMessage>Access-concentrator name can only contain alpha-numeric letters, hyphen and underscores(max. 100 characters)</constraintErrorMessage> </properties> </leafNode> <!-- include end -->