[ANN] XML Enhancements for Java 1.0
We are happy to announce the release of the XML Enhancements for Java (XJ) compiler and runtime system on Alphaworks ( http://www.alphaworks.ibm.com/tech/xj). The XML Enhancements for Java (XJ) project extends Java 1.4 with first-class support for XML. In XJ, one can import XML schemas just as one does Java classes. All the element declarations in the XML schema are then available to programmers as if they were Java classes. Programmers can write inline XPath expressions on these classes, and the compiler checks them for correctness with respect to the XML schema. In addition, it performs optimizations to improve the evaluation of XPath expressions. A programmer may construct new XML documents by writing XML directly inline. Again, the compiler ensures correctness with respect to the appropriate schema. By integrating XML and Java, XJ allows programmers to reuse existing Java libraries in the development of XML code and vice-versa. The XJ language has the following advantages: Familiarity (for the XML Programmer) : XML processing in XJ is consistent with open XML standards. Robustness : XJ programs are strongly typed with respect to XML Schemas. The XJ compiler can detect errors in uses of XPath expressions and construction of XML data. Easier Maintenance: Since XJ programs are written in terms of XML and not low-level APIs such as DOM or SAX, they are easier to maintain and modify if XML Schemas change. Performance: Since the compiler is aware of the use of XML in a program, it can optimize the runtime representation, parsing, and XPath evaluation of XML. We have released a prototype compiler and runtime system on Alphaworks ( http://www.alphaworks.ibm.com/tech/xj). XJ is an evolving language, and we are extremely interested in feedback on the utility of its features. We are interested in what people think about "tight" integration of XML into Java. Our opinion is that it makes XML processing applications more efficient and robust. Mukund Raghavachari IBM T.J. Watson Research Center http://www.research.ibm.com/people/m/mrm XJ: the XMLification of Java (http://www.research.ibm.com/xj)
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