Notes

Outline

Flexsys and XML Scandura

Flexsys Overview AST (w/ semantic attributes) representation and manipulation of data/processes:    - manually in visual Flexforms    - automatically via High Level      Design and/or C/C++ API

Slide 3

Flexsys and XML Conversion XML Reverse Engineer & Generator XML Converter  On-the_Job Converter     (planned)

Creating XML Reverse Engineer Create bison/yaac compatible XML grammar Flexsys automatically identifies terminal tokens Define patterns (regular expressions) for tokens Specify XML constructs to appear in Flexforms Specify relationships between Flexform structure and productions in grammar Flexsys automatically generates default commands Customize commands as desired Flexsys automatically generates XML reverse engineer and lexical analyzer

Illustrative XML Grammar Goal -> DTD  FULL_BODY DTD -> < !DOCTYPE ID [ ELEMENTS ] ELEMENTS -> < !ELEMENT ID ( ID_list ) >              -> < !ELEMENT ID ( ID_list ) * >                      -> < !ELEMENT ELEMENTS ID_list   ->      -> ID      -> ID ID_list FULL_BODY -> < NAME > BODY BODY -> < ID >  text < neg_ID >            -> < ID > BODY < neg_ID > neg_ID -> < / ID > NAME -> < DOCUMENT > NOTE: ID stands for identifier, and text for any text string.

Grammar in Flexform (after reverse engineering)

Define Token Patterns

Specify Flexform Structure

Specify Relationships Between Grammar & Flexform Structure 1

Specify Relationships Between Grammar & Flexform Structure 2

XML Reverse Engineer

Generating Reverse Engineer (approx. 1 min.)

Process XML Doc as Text

Process after Reengineering (as Flexform in structured display)

XML Conversion Define DTD Patterns Flexsys Generates Code to Detect Patterns and Assigns Names to Key Parts of Patterns Use High Level HLD Language to Manipulate Patterns Flexsys Creates Custom Converter

Specify Pattern to Detect

Use HLD to Manipulate Matching Source Structures

Auto-Customize Flexsys

Task: Convert Data Base & Create Subroutine

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Output

Summary XML lends itself to Flexform Representation Flexsys makes it easy to detect and manipulate Flexform patterns Obvious Application: Use Flexsys to convert between different XML documents (based on different DTD patterns)

Sample XML Document Type Declaration / DTD (Opt.) <? XML version = “1.”?>            // globally applicable XML prolog <!DOCTYPE DOCUMENT [     //Document Type Declaration <!ELEMENT DOCUMENT (CUSTOMER)*>                                                       // DTD defines XML document <!ELEMENT CUSTOMER (NAME, ORDERS)> <!ELEMENT NAME (LAST_NAME, FIRST_NAME)> <!ELEMENT ORDERS (ITEM)*>      ]>         NOTE:  A DTD is equivalent to a Flexsys program declaration.

DTD’s as Flexform Patterns DOCUMENT CUSTOMER NAME LAST_NAME FIRST_NAME ORDERS ITEM NOTE: This has the advantage of making it easy to check that otherwise valid XML documents conform to given DTD definition

On-the Job XML Converter

What You Can Do Represent Source/Target XML DTDs as Flexform patterns    -- extend reverse engineer Specify source -> target DTD mapping between patterns    -- available in Flexforms, w/ GUI option Automatically generate HLD conversion code from the mapping       -- preliminary plan

Sample HLD Conversion Code

Benefits Structured XML Editing Easier Maintenance Protection Against Standards Changes Automated Custom Conversions Ease of Use Extendable to Legacy Integration XML Commercialization Partner