The OpenJade Project. XMLDev 99 conference Didier PH Martin Talva Corporation. OpenJade founder, lead.

Agenda  Origins  OpenJade today  Goals  OpenJade Architecture  OpenJade concepts  Relationships  DSSSL Next generation

Origins  Based on Jade created by James Clark  Given to the DSSSL user group by James  A development team formed from the DSSSL user community

OpenJade today  A growing development team  Is a DSSSL engine, but we have no problems to use the code base for mixed DSSSL/XSL implementations. Interested?  Is C++ based.  We are documenting the internals  We are implementing the missing parts we think are important  If very fast…and is improving

OpenJade today  An international design and development team  Sweden  Germany  Israel  USA  Canada We need more help. Interested? OpenJade wants you

OPenJade Today  Special projects  BraiFo (a Braille Formatter)  Template experiment  Several Web Site using OpenJade to generate HTML pages from XML  Publishers using OpenJade to format SGML/XML documents into printed formats.

OpenJade Today  What we learned  We should not try to create constructs better expressed by procedural language (resist to the temptation of putting everything in tags simply because we have an XML/SGML parser)

Our home page We will move to

Goals  Improve OpenJade XML support  Document, document, document  Cooperate with different platforms/toolkits  Offer APIs  Make it more accessible

OpenJade architecture SGML/XML parser Grove engine Scheme engine Script languages JavaScript, PerlScript, PythonScript, VBScript XSL engine? API MIF RTF HTMLTexPDF SGMLXML API

OpenJade architecture SGML/XML parser Grove engine Scheme engine Script languages JavaScript, PerlScript, PythonScript, VBScript XSL engine? API MIF RTF HTMLTexPDF SGMLXML API

OpenJade Arhitecture  C++ based  Expat (the fatest)  Microsoft  Java based  IBM  DataChannel  Others… SGML /XML Parser interface DOM based parsers are, in some ways, simplified GROVE engines. Goal? interface with DOM based parsers

OpenJade Architecture  Goal:  Link for more sophisticated Grove Engines Goal: publish an API for Grove/DOM interfacing CORBA IDL, DCOM IDL.

OpenJade architecture SGML/XML parser Grove engine Scheme engine Script languages JavaScript, PerlScript, PythonScript, VBScript XSL engine? API MIF RTF HTMLTexPDF SGMLXML API

OpenJade Architecture  Goal:  Add new SGML/XML processing languages  Add incoming and outgoing SGML/XML processing  Candidates  Xscripts (rule based language using VBScript, JavaScript, PerlScrip, Python Script languages  XSL (MITRE C++ engine?)  Next generation DSSSL

OpenJade architecture SGML/XML parser Grove engine Scheme engine Script languages JavaScript, PerlScript, PythonScript, VBScript XSL engine? API MIF RTF HTMLTexPDF SGMLXML API

OpenJade Architecture  Formatters  A rich collection of Formatters  MIF  RTF  SGML  XML  HTML+CSS  PDF  FOT  Add new ones

OpenJade Concepts  Collection of Objects  Visual Objects  A visual layout model with Flow based layout (absolute positioning is the next step).  Aural Objects  Tactile Objects  Objects accessible from different expression languages  Rule based processing

Relationships  Linux Communities and ISVs  Debian Linux  SUSE Linux  Red Hat?  NetFolder (The SGL/XML Kit)

Demo

DSSSL Next generation  First Step  Assemble the knowledge gained in the last five 5 years  Integrate new powerful concept such as:  Template based rules  New addressing and queries models and languages  Base our design on a model not on a particular language.

DSSSL The Next generation  Keep The actual features  Backward compatibility  Start the process from the actual OpenJade Community.  Make a DSSSL 2 proposal to the ISO community.

OpenJade Next generation  What we learned  We are moving from Object oriented processing to data flow processing  We transform data into different kind of objects/different models.  We have to make explicit the model supported by a transform engine  The model should be independent of a particular language

What’s next Read the OpenJade News to know more

Questions?