This paper discusses in detail the design and implementation phases during the creation of the Bulgarian HPSG-based treebank (BulTreeBank). First, the interconnection of the HPSG language model, the linguistic parameters of the annotation scheme and the underlying formalism is considered. Then, the architecture of their implementation is described with respect to the interface compatibility between two software tools: the CLaRK System and the TRALE System. Also some innovative strategies are introduced concerning two problems: the HPSG grammar application to a less-processed language like Bulgarian and the controlling mechanisms over the manual annotation work.

CLaRK is an XML-based software system for corpora development. It incorporates several technologies: XML technology; Un i code ; Regular Cascaded Grammars; Constraints over XML Documents. The basic components of the system are: a tagger, a concordancer, an extractor, a grammar processor, a constraint engine.

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