API documentation says it has limited support for XHTML: [I]Before submitting HTML content over the EDAM API the client application is expected to follow the following steps: 1.Convert the document into valid XML 2.Discard all tags that are not accepted by the ENML DTD 3.Convert tags to the proper ENML equivalent (e.g. BODY becomes EN-NOTE) 4.Validate against the ENML DTD 5.Validate href and src values to be valid URLs and protocols [...]