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<tiger2/>: serialising the ISO SynAF syntactic object model

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This paper introduces <tiger2/>, an XML format developed to serialise the object model defined by the ISO Syntactic Annotation Framework SynAF. Based on widespread best practices we adapt a popular XML format for syntactic annotation, TigerXML, with additional features to support a variety of syntactic phenomena including constituent and dependency structures, binding, and different node types such as compounds or empty elements. We also define interfaces to other formats and standards including the Morpho-syntactic Annotation Framework MAF and the ISOCat Data Category Registry. Finally a case study of the German Treebank TueBa-D/Z is presented, showcasing the handling of constituent structures, topological fields and coreference annotation in tandem.

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  2. <s> stands for any syntactically annotated segment—this need not be a sentence, and can also be larger, as in a textual segment, or smaller as in a phrase.

  3. Reserved attributes like @type carry the namespace tiger2 in order to allow a further user-defined attribute @type .

  4. An anonymous reviewer has asked whether <tiger2/> data could also be represented in a tuple store (e.g. in RDF): this is certainly possible. It should be noted that not all conceivable graphs can be represented in the format. For example n to m edges connecting multiple nodes at a time are not supported.


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ISO Standards/Drafts

  • ISO/DIS 24611 Language resource management—Morpho-syntactic annotation framework (MAF)

  • ISO/DIS 24612 Language resource management—Linguistic annotation framework (LAF)

  • ISO 24615 Language resource management—Syntactic annotation framework (SynAF)

  • ISO 12620 Terminology and other language and content resources—Specification of data categories and management of a Data Category Registry for language resources; implemented in

  • ISO 24610-1. Language resource management—Feature structures—Part 1: Feature structure representation.

  • ISO 24613 Language resource management—Lexical markup framework (LMF).

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Correspondence to Laurent Romary.

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Romary, L., Zeldes, A. & Zipser, F. <tiger2/>: serialising the ISO SynAF syntactic object model. Lang Resources & Evaluation 49, 1–18 (2015).

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