DITA Briefing3

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An introduction to DITA processing: 

An introduction to DITA processing Exploring aspects of the processing model Title slide


Overview Design points for the processing model Levels of DITA processing Special DITA considerations Application considerations Processing implementations Note: examples include output generated using 'dita13' external toolkit.

Design points for the processing model: 

Design points for the processing model Separation of content from context, presentation, hence: Multiple applications Multiple outputs Emphasis on typing and semantics Role of specialization awareness in workflow components: Editors Processors

Levels of DITA processing– topics: 

Levels of DITA processing– topics Editor view Literal, like the HTML model Server-enhanced; client/server continuum Dynamically modify the outbound XML for links,data; partial build, instilling relationships from the repository. Built-out HTML/PDF Full map-based instantiation of relationships

Levels of DITA processing – maps: 

Levels of DITA processing – maps Selection of topics from a content pool for a deliverable Alternate maps for different delivery models (print vs user assistance) Aggregation Query- or filter-based views Print-on-demand (user-selected) views Navigator/topic sets Navref Instilling of relationships during static build versus dynamic transcoding

Special DITA considerations: 

Special DITA considerations Conref and xref resolution Specialization awareness; defaults and overrides Pushed navigation (related links from maps) Metadata inheritance Conditional processing (filtering/flagging) Index and term processing Localization – externalized strings Generalization and respecializations Normalization and denormalization For DTD-free rendering (like the bookmap intermediate stage)

Application considerations: 

Application considerations Preferred editor behaviors Limitations of name-based style associations CSS-like (source view, class-based selectors for style properties) XSLT-based (result view, class-based transforms) Content management XML source management (no particular file bias) Link management (aids to authors) Non-text resources (access to graphics, multimedia, etc.) Output behaviors Push-based views (typical for content) vs Pull-based views (for example, sorting of related links based on attributes)

Processing implementations: 

Processing implementations DITA toolkit today Envisioned: Open Source based transforms Commercial-off-the-shelf components Editors, CMS Transform suites Final form tools (such as FO composers, help compilers) Turnkey applications Integrated tools Supportive of particular tasks

DITA toolkit closeup: 

DITA toolkit closeup Goals: Share the design for community feedback Reference implementation Enable a user community and shared contribution Enable a drop-in implementation for vendors Open Source intent (supported public implementation)

DITA Toolkit, continued: 

DITA Toolkit, continued Features: DTDs and Schemas topic and core specializations: concept, task, reference XSLT-based, specialization-aware transforms Output transforms Utility transforms CSS stylesheets for presentation Sample content (/doc and /samples directories) Demo specializations Ant build demos

DITA Toolkit, continued: 

DITA Toolkit, continued Outputs: HTML Web HTML Help JavaHelp Eclipse Help PDF Other possibilities: Help systems (for example, QT library help) Word processing formats (round-trip vs single use considerations) XHTML variants (for example, HTML-Mobile profile) Other: troff, man, TeX, flat text, etc..

DITA Toolkit Demos: 

DITA Toolkit Demos Review a fully processed /out directory Live demo of eNote topic specialization: Specialized output (override XSLT provides views and behaviors) Default output (class-based support for archetype processors) Live demo of map-driven 'samples' tasks for web and PDF: Sequential processing vs aggregation XSL-FO rendering as an additional processor in the pipeline Live demo of bookmap specialization: Example of a specialized map Enables more book-like processing on the aggregate Candidate for TC consideration


Summary The DITA toolkit is a reference implementation of many of the design behaviors for DITA processing: Specialization awareness Multiple map-based views Multiple outputs DTDs and Schemas with specialization design patterns Next steps: Work on the bookmap specialization Identify any clarification needed for the model Need agreement on standard organization for use by vendors Movement toward Open Source maintenance

Further reading: 

Further reading DITA Toolkit, 'DITA-ant.xml' and 'DITA-tweaks.xml' 'V2-DITA Considerations for a DITA authoring/production system' news://news.software.ibm.com:119/bp6r67$7v08$1@news.boulder.ibm.com Discussion threads on processing pipeline models

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