Simple API for SGML

Simple API for SGML (SAS) is an event-driven, serial-access mechanism for accessing SGML documents with JAVA. Very similar to SAX it allows you to handle events :

• Error Handler : to handle warning, error and fatal erros
• Declaration Handler : events related to the parsing of the SGML declaration part
• Definition Handler : events related to the parsing of the SGML definition part (DTD)
• Instance Handler : events related to the parsing of the SGML document it self

Very simple to use, it allows you also to deal with the SGML document as XML document :

• Convert from SGML to XML with many options

• Convert from XML back to SGML

  • infine allows converting from SGML to SGML
  • transparency : dealing only with XML

• Transforming SGML with XSLT transform for various engine like SAXON API (directly as a source or throw extension function)

• Thread SAFE : very usefull for big data

Usage

Like SAX, we need to declare a Reader :

final SASParserFactory factory = SASParserFactory.newInstance();
factory.setValidating(true);

final CatalogResolver catalogResolver = new CatalogResolver();
catalogResolver.addCatalog("file:/d:/sgml/sgml.catalog");

SASParser parser = factory.newSASParser();
Reader reader = parser.getSGMLReader();
reader.setEntityResolver(catalogResolver);

This is a catalog sample :

SGMLDECL "docbook.dec"
PUBLIC "ISO 8879-1986//ENTITIES Added Latin 1//EN" "entities/Isolat1.ent"
DOCTYPE BOOK "doctypes/book.dtd"

The SGMLDECL and the DOCTYPE entries are mandatory.

For dealing with SGML events :

reader.setInstanceHandler(new InstanceHandler() {
		
		@Override
		public void startElement(String[] grpList, String qName) throws SASException {
		}
		
		@Override
		public void startElement(String qName) throws SASException {
		}
		
		@Override
		public void startDocument() throws SASException {
		}
		
		@Override
		public void startContent() throws SASException {
		}
		
		@Override
		public void setDocumentLocator(Locator locator) {
		}
		
		@Override
		public void processingInstruction(String content) throws SASException {
		}
		
		@Override
		public void endElement(String[] grpList, String qName) throws SASException {
		}
		
		@Override
		public void endElement(String qName) throws SASException {
		}
		
		@Override
		public void endDocument() throws SASException {
		}
		
		@Override
		public void emptyStartElement() throws SASException {
		}
		
		@Override
		public void emptyEndElement() throws SASException {
		}
		
		@Override
		public void comment(String string) throws SASException {
		}
		
		@Override
		public void characters(char[] ch, int start, int length) throws SASException {
		}
		
		@Override
		public void attribute(String qName, String value) throws SASException {
		}
});
				
reader.parse(new InputSource("file:/d:/sgml/file.sgm"));

or more simple for converting to XML document :

XMLReader xr = reader.asXMLReader();
Source src = new SAXSource(xr, new InputSource("file:/d:/sgml/file.sgm"));

Result res = new StreamResult("file:/d:/sgml/file.xml");
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(src, res);

We can configure the SASParserFactory :

factory.setFeature(SASParserFeatures.QUANTITY_CHECKING, true);
factory.setFeature(SASParserFeatures.CAPACITY_CHECKING, false);
factory.setFeature(SASParserFeatures.ID_REF_CHECKING, true);

Version

Home Edition

See the documentation

This is an evaluation version with some features desactivated :

• Fully java support for SAS like support, conversion in XML, parsing SGML declarartion and DTD definition
• Some SGML declaration features not supported : DATATAG, RANK
• Somme DTD features not supported : USEMAP, PIENTITY, STARTAGENTITY, ENDTAGENTITY and MSENTITY
• Some instance handler event deactivated for entities and attrbutes : all event fired as character event or ignored

Professional Edition

See the documentation

adds a number of features to HE version :

• All SGML declaration features supported
• All DTD features supported
• Fully instance handler event support

Entreprise Edition (coming soon)

The fully-featured product with in addition :

• SGML reader and writer support :
  • Directly for performance
  • Transparency with XML support
• DTD canonizing
• ...

Evaluation

For PE or EE version, please create an issue with the following informations :

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