The Efficient XML Interchange Working Group has published a Working Draft of the EXI Canonicalization (EXI C14N) specification. It describes a relatively simple method for generating a physical representation, the canonical form, of an EXI document that accounts for the permissible differences between two logically equivalent EXI documents. One application field for the canonical form of an XML-based document or document subset is digital signature. Supporting EXI canonicalization without going through plain-text XML is preferable in constrained environments and device classes where document size and processing overhead are critical. Learn more about the Extensible Markup Language (XML) Activity.