BAH DAML Tools

1. BAH DAML Tools • XML To DAML • Query Relevance Assessor • DAML XSLT Adapter

2. XML To DAML • The high level tasks in order are • XML Schema to DAML - current task • XML DTD to DAML - via XML Spy as a preprocessor • XML Content to DAML - dependent on the language map • XML Schema to DAML Accomplishments • Import problem solved: Graphs of XML schemas can be translated over time • Core XML Schema components currently supported • Namespace & nonamespace schemas • Simple/complex element declarations & Attribute declarations • Global/anonomous attribute groups, model groups, & complex type declarations • sequence (currently without order semantics), choice (based on a daml set difference), & all • attributes & attribute refs, simple/complex elements & element refs, & group refs • The language map - cascading Restrictions model nested XML schema components • Challenges • The harder portions of the language map • includes • fixed/default/null values, mixed/empty content, derivation by restriction/extension • order semantics, elemement substitution groups, abstract elements/types, block/final, wildcards

3. Query Relevance Assessor(QRA) • Query Relevance Assessment with the QRA is HOT. . . • Demonstrates how DAML can be used to enhance the accuracy and precision of WWW text retrieval by relevance ranking DAML mark-up • Exploits the wealth of contextual knowledge contained within DAML ontology classes, properties, and instances • Imparts a semantic component to relevance rankings of DAML-annotated text with respect to query terms when only minimal query context may be available • Achieves a minimal loss of semantic information important for relevance ranking • . . . yet significant CHALLENGES remain • Incorporate indirect relevance ranking and free text search • Address semantic heterogeneity • Support multi-term queries in a semantically appropriate fashion • Investigate incorporation of machine learning methods for categorizing DAML mark-up

4. DAML XSLT • What’s Hot with DAML XSLT! • Enables an end user to perform a myriad number of unique transformations on a DAML resource (mark up) leveraging current XSLT technology. • Makes DAML useful to a much wider audience of users (it offers a quick and easy way to exploit the power of DAML, and package it into a familiar form, such as: XML, HTML, WML, BizTalk, etc.) • Accomplishments • Built a “new” DAML Instance Model and converted DAML to representative XML by encoding DAML cycles into “cycles-less” XML. • Created a powerful, reusable Java component for DAML transformation • Challenges • Scalability - Large Data Sets -How much is too much? • Currently No “Partial” DAML Conversion • Add Input Filters to pare down large data sets • Choice of “Root Node” for the Representative XML • Ordering of XML Elements • Currently uses alphabetical sorting of Subjects and Predicates • Use a “style sheet” to impose ordering/filtering/sorting of elements • Continued Development of a robust DAML Instance Model • Focus on instance data creation, visualization, navigation, and manipulation • Multi-Pass DAML Translation • Current XSLT is single-pass only • Leverage DAML cycles, relationships, etc.

5. BAH DAML Website • The July PI meeting presentations can be found at http://www.davincinetbook.com:8080