1. 1999-12-09Proposal for Using ISO 11404, F. Farance 1 ISO 11404 for Data Models Frank Farance, Farance Inc. +1 212 486 4700 frank@farance.com http://edutool.com

2. 1999-12-09Proposal for Using ISO 11404, F. Farance 2 What Is ISO 11404? Language Independent Datatypes LID is the pseudo-code for datatypes XML is too low level UML is too high level LID can bind to XML, SQL, C/C++, Java, JavaScript

3. 1999-12-09Proposal for Using ISO 11404, F. Farance 3 ISO 11404 Can Be Used For Describing Semantics Functionality Conceptual Model Semantics Bindings: APIsBindings: CodingsBindings: Protocols Encodings: Data Formats Encodings: Calling Conventions Encodings: Various Communication Layers IEEE 1484.X Informative Wording IEEE 1484.X Normative Wording IEEE 1484.X, IEEE 1484.14 XML IEEE 1484.14 SDA Informative Wording IEEE 1484.X, IEEE 1484.14 SDA Normative Wording IEEE 1484.X, 1484.14, And Other Standards IEEE 1484.15 DCTP, IEEE 1484.16 HTTP Various Standards Requirements

4. 1999-12-09Proposal for Using ISO 11404, F. Farance 4 Example of ISO 11404 // LOMClassificationRecord: Description of a characteristic of // the resource by entries in classifications. type LOMClassificationRecord = unordered extendable record ( // Purpose: Characteristics of the resource described // by this classification entry. optional Purpose: LOMLangStringType(128) extendable selecting ( (Language = "en", String = "Discipline"), (Language = "en", String = "Idea"), (Language = "en", String = "Prerequisite"), (Language = "en", String = "Educational Objective"), (Language = "en", String = "Accessibility Restrictions"), (Language = "en", String = "Educational Level"), (Language = "en", String = "Skill Level"), (Language = "en", String = "Security Level"), ), );

5. 1999-12-09Proposal for Using ISO 11404, F. Farance 5 XML Bindings Generated From ISO 11404 Create a set of transformation rules Rules can describe a grammar Sample for LOM: –Map all identifiers to tags –Map all LangStrings to: Language sets LANG attribute in parent (target) String sets value in parent (target) –Prefix (or not) top level elements with LOM

6. 1999-12-09Proposal for Using ISO 11404, F. Farance 6 How Extensions Work [1/2] –Determining a valid or invalid datatype? –Elements recognized, specified in standard –Elements identified as extensions Applications can ignore or process Applications describe which actions they take Also known as implementation-defined behavior –Elements neither in standard nor identified as extensions Implementation-defined (or undefined) behavior

7. 1999-12-09Proposal for Using ISO 11404, F. Farance 7 How Extensions Work [2/2] Extensions are important for future revisions of standard Extension prefix (specified in bindings) –MIME uses X- for prefix –Programming languages use __ (double underscore) for prefix