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Building on our previous work on the combination of JavaCC and SAX, we developed a new syntax-directed processing environment for XML documents. In this new environment, we use CUP as the parser-generation tool and StAX as the interface with the underlying XML parsing framework. The new environment supports a richer set of processing-specific context-free grammars (i.e., the grammars used for representing...
This paper proposes a generative approach to the construction of XML processing components. This approach promotes the high-level description of XML processing tasks with attribute grammars (a high-level formalism used in the definition of computer languages). The components themselves are produced by automatically processing these high-level specifications with a suitable generator. The approach...
The services provided by learning object repositories are usually enabled by the processing of the metadata documents associated with these learning objects. This paper proposes a way to process these metadata documents, which are usually encoded in XML, through a framework called XLOP. XLOP is based on attribute grammars, a well-known technique used in the development of language processors. XLOP...
This paper presents XLOP (XML language-oriented processing), an environment that permits the description of XML processing applications with attribute grammars (formalism used to describe the semantics of computer languages). The environment also includes a generator able to translate attribute grammar-based specifications into the specification language of CUP, a well-known YACC-like environment...
Educational Modeling Languages (EMLs) are notations that allow instructors to formally describe educational processes, including teaching and learning interactions and activities. The description of a specific teaching process using an EML is called a learning design. EMLs, where IMS Learning Design (IMS LD) is becoming a "de facto" standard, address aspects such as the interoperability...
In this paper we show how to integrate JavaCC, a popular translator-generation tool, with any standard XML parsing environment supporting the SAX specification. This integration lets developers build efficient XML processing applications which act as left-to-right, one-pass translators. The integration also facilitates the maintenance of these applications, since they are specified as syntax-directed...
This paper describes a social approach to tagging learning objects with metadata. In this approach learning objectspsila creators use a metadata schema that is extended with new categories as more and more learning objects are tagged. These new categories are made available for the rest of the creatorspsila community. The approach also lets creators restructure metadata schemas. The mechanism is also...
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