@inproceedings{HilbertSchonefeldWitt2016, author = {Mirco Hilbert and Oliver Schonefeld and Andreas Witt}, title = {Making CONCUR work}, series = {Proceedings of Extreme Markup Languages 2005}, publisher = {Extreme Markup Languages Conference}, address = {Montreal}, url = {https://nbn-resolving.org/urn:nbn:de:bsz:mh39-45299}, year = {2016}, abstract = {The SGML feature CONCUR allowed for a document to be simultaneously marked up in multiple conflicting hierarchical tagsets but validated and interpreted in one tagset at a time. Alas, CONCUR was rarely implemented, and XML does not address the problem of conflicting hierarchies at all. The MuLaX document syntax is a non-XML syntax that enables multiply-encoded hierarchies by distinguishing different “layers” in the hierarchy by adding a layer ID as a prefix to the element names. The IDs tie all the elements in a single hierarchy together in an “annotation layer”. Extraction of a single annotation layer results in a well-formed XML document, and each annotation layer may be associated with an XML schema. The MuLaX processing model works on the nodes of one annotation layer at a time through Xpath-like navigation. CONCUR lives!}, language = {en} }