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The LTfLL Annotation Tool helps teachers prepare text for analysis, by providing a semi-automatic authoring tool which annotates and tags words and phrases in the text. The annotations of the corresponding phrases in the text are concepts from one ontology. The automatic annotation is done via an ontology-to-text relation. It provides a mechanism for explicating the conceptual information within the text. The ontology-to-text relation model comprises one domain ontology; a lexicon, mapped to it; and a concept annotation grammar based on cascaded regular grammar technology, which finds the concepts lexicalizations in the text, and assigns them the appropriate concepts from the ontology. After the automatic annotation the teachers are able to modify the annotation manually. The annotation produced in this way is used in the semantic search for later use of the learning materials.
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