Author: Dirk Riehle

Abstract: Wikis have become an important application on the web and in the enterprise, yet there are no interoperability standards between different wiki engines. We present the first complete XML representation format of Wiki Creole 1.0. Wiki Creole is a community standard for wiki markup, the language used to write wiki pages. This report presents the complete XML representation format using a validating XML schema. In addition we present XSLT definitions for transforming the XML representations to XHTML on the one hand and for transforming the XML representations to Wiki Creole markup on the other hand. Our work shows how using XML technologies we can make wiki interchange, wiki upgrading, and wiki conversion independent from a specific wiki engine implementation.

Reference: Martin Junghans, Dirk Riehle, Umit Yalcinalp. In ACM SIGWEB Newsletter, Volume 2007, Issue Winter (Winter 2007), Article No. 5. ACM Press, 2007.

Available as a PDF file.

Abstract: Today’s wiki engines are not interoperable. This is an unfortunate consequence of the lack of rigorously specified standards. This technical report presents a complete and validated EBNF-based grammar for Wiki Creole, a community standard for wiki markup. Wiki Creole is also the only standard currently available. Wiki Creole is being specified using prose, leading to inconsistencies and ambiguities. Our grammar uncovered those ambiguities which we fed back into the specification process. The Wiki Creole grammar presented in this report makes the creation of Wiki Creole parsers simple using parser generators, ANTLR in our case. Using a precise specification of wiki markup lets us decouple wiki editors from wiki storage from further wiki processing tools. Based on this decoupling layer we expect innovation on these different parts to proceed independently and at a faster pace than before.

Reference: Martin Junghans, Dirk Riehle, Rama Gurram, Matthias Kaiser, Mario Lopes, Umit Yalcinalp. In ACM SIGWEB Newsletter, Volume 2007, Issue Winter (Winter 2007), Article No. 4. ACM Press, 2007.

Available as a PDF file.