oneM2M-MP-2013-0197-Data_Model_Repository

Establishing Data ModelRepository for oneM2M

Group Name: Method and Procedure Sub-commiteeSource: WG3 chairMeeting Date: 2013-12-03Agenda Item: Data Repository

oneM2M-MP-2013-0197-Data_Model_Repository

Introduction

• During technical discussion in WG3(PRO), there are need for having a registry for data model descriptions (eg. XML Schema or JSON Schema) for data types and structures defined in oneM2M.

• There are not any rules for handing ‘machine-readable document’ in by ‘Method of Work’

• We would like to raise the issue, and also suggest to add the new rule for it.

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oneM2M-MP-2013-0197-Data_Model_Repository

What is a data model registry?

• A data model registry is a system to manage the definitions of data types and structures, such as W3C compliant XML Schemas.

• XML Schema Registry allows TSs to export data structure syntaxes in machine-readable way.

• XSD files enable XML parsers to validate given compliance of XML document with XML schema definitions.

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oneM2M-MP-2013-0197-Data_Model_Repository

Usage of XML/JSON Schemas

TS

XSDFiles

XSDFiles

XSD / JSDFiles

oneM2M Protocol Implementation

+

ProtocolMessage

with namespace

Detailedexplanation of behaviors and namespaces

Syntax Rules

Refer data type in XSD / JSD by namespace

Validation

Get XSD / JSDfiles on the fly (Optional)

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oneM2M-MP-2013-0197-Data_Model_Repository

Management Policy Options• Option-A: Manage URN Namespaces– Register top level URN (Uniform Resource Name) for

oneM2M in IANA registry (with free of charge)Ex) urn:onem2m

– Assign child URN as namespace for each data types within oneM2M

• Option-B: Manage XSD/JSD files– Manage XSD/JSD files with unique names– (Optionally) publish XSD/JSD files at oneM2M site

• Option-C: Both A & B

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oneM2M-MP-2013-0197-Data_Model_Repository

Issues

• Determine management policy for oneM2M XML Schema Repository.

• Change oneM2M portal to manage XSD/JSD files (if necessary).

• Modify the ‘Method of Work’ to reflect determined management policy for ‘oneM2M Data Model Repository’.

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oneM2M-MP-2013-0197-Data_Model_Repository

[FYI]References• XML Schema Part 0: Primer Second Edition

http://www.w3.org/TR/xmlschema-0/

• JSON Schema:http://en.wikipedia.org/wiki/JSON_Schema#JSON_Schemahttp://tools.ietf.org/html/draft-zyp-json-schema-04

• URIs, URLs, and URNs: Clarifications and Recommendations 1.0http://www.w3.org/TR/uri-clarification/

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