nx01/src/site/wigiti/README-x4o.md

X4O

X4O is not an XML parser but a recursive self configuring XML dialect language library.

X4O is very old code from pre 1.5 non-generics nice object java.

2025 TODO

• Add 18 bit SAX4 XML read and write support
• RM 8 bit String DEP, replace javax.el by simple obj map
• Upgrade X4O element language to support 18 bit XML
• Remove some features to ease "write" and SAX4 support
• Move all XML uri's to oasis style thus replacing all internal http namespace locators
• Add jaxb annotation support to define a x4o language and have XSD and documention tools
• (DONE) Remove SAXException and replace with IOException for auto close tag printer API support
• Cleanup old todo/ideas from below

OLD todo

• Fix debug output
• RM function methods from Element interface
• finish eld doc-output content
• Make generic/safe? config bean
• • Make language config done by driver xml parser
• change (internal) x4o language to "x4o-" prefix so; x4o-cel,x4o-eld,x4o-meta
• Add language locking, and lock eld/cel and add -eld wrap language for eld extentions per language
• Add doc version upgrade handler
• • per version step xslt doc upgrade (check dyna sax piplining hooking)
• • per version eld + support code + backing objects (DONE)
• • per version eld for dyna tree convert to new backing objects
• Add Local layer for X4OLanguage classes
• Add default define (EL) layer
• Bring back xml read+write streaming language support
• static field constant converter
• add default list and map converter/handler
• full Xinclude test
• move loading back into sax phase so version can readout on root tag
• tag aliases
• [lang]-el-beans.xml loading
• Add XML schema tags to ELD
• Auto generate schemas from eld
• Basic editor support
• Make converter config/loading better
• Single xsd output
• class dtd entity loadings
• new ns for entity catalog for class resource
• Add w3c html namespace in eld for description tag
• move Boolean default from code to xml + conf

OLD IDEAS

• add mini xslt parse on top of streaming api
• add support javax.xml.xpath for xpath support
• add java.script support
• event listeners on all DOM tree element operations
• custom and merga'ble parse phases for speed
• make element tree jdom api compatible
• Test if possible to use threadpool for executing phases

test v2;

• x4o-driver
• x4o-s4j-jaxp (dom,sax,stax,xslt) (jsr; 5,63,173)
• x4o-s4j-sax
• x4o-s4j-stax
• x4o-s4j-jaxb (jsr; 222)

OLD v1 todo NON-CODE

• Add tutorial
• doc eld and x4o lang files

OLD v1 todo CODE

• Add (super) tag for extending tags of other namespace
• XMLOverrideEvent
• • inboud sax parser !!
• • input stream output converter :)
• eld static method binding for EL
• (50%) converters
• more junit tests
• • multi and overrides in namespaces
• • localoverride
• (DONE) multi phase parsing
• • for loop support
• • templateing.
• • merging of object tree's
• • sax with all x4o feutures like templating
• x4o:include option
• • Xinclude option
• • SAX events as input source
• (70%) XML debug output

OLD versions

Version 0.8.7:

• Created jdk7(CSS) javadoc compatible documentation
• Create language task api and converted the current tasks
• Renamed X4OLanguageContext to X4OLanguageSession
• Renamed ElementNamespaceContext to ElementNamespace
• Removed binding handler from element interface
• Refactored all property keys with PropertyConfig bean
• Change global attr to namespace attributes
• Updated ant/maven plugins to new task and properties
• Added options to xml writer like OUTPUT_LINE_BREAK_WIDTH

Version 0.8.6:

• Changed to X4ODriver interface
• Added (simple) write support
• Added ant and maven plugins

Version 0.8.5:

• Made module loading system
• Added eld to schema generator
• Added eld to html generator
• Cleaned xml uri nameing
• refactored ELD tag names
• Made elddoc ~working
• Changed phase enum to text phases

Version 0.8.0:

• Changed packages to org.x4o
• Made converter two way
• Added debug writer