CALL "C$XML" USING CXML-MODIFY-ATTRIBUTE-VALUE                     handle                     attrNum                     attrValue                    [attrLength]  | 
CXML-MODIFY-ATTRIBUTE-VALUE  | Constant  | |
handle  | USAGE HANDLE  | A XML element handle.  | 
attrNum  | PIC 9(n)  | Specifies the ordinal number of the attribute to modify.  | 
attrValue  | PIC X(n)  | Specifies the new value of the attribute.  | 
attrLength  | PIC 9(n)  | Specifies the length of the new attribute value. If omitted, it defaults to the length of attrValue.  |