Why oBIX?

1
Why oBIX?

• XML standard
• Enterprise friendly protocol
• High fidelity

2
Architecture

• Object Model modeling
• XML Syntax serialization
• URLs naming
• REST fits into web architecture
• Contracts semantics
• Extendibility philosophy
• Protocol Bindings networking

3
Architecture Object Model
4
Architecture XML Syntax

• ltobj href"http//myhome/thermostat/"gt
• ltobj name"spaceTemp" is"obixRealPoint "gt
• ltreal name"value" val"73.1"/gt
• lt/objgt
• ltobj name"setpoint" is"obixRealPoint "gt
• ltreal name"value" val"74"/gt
• lt/objgt
• ltstr name"description" val"In Living Room"/gt
• lt/objgt

5
Architecture - URIs

• Uniform/Universal Resource Identifier
• AKA URLs
• Naming for WWW
• Relative URLs
• Assigning everything with a URL

6
Architecture - REST

• REpresentational State Transfer
• Identify resources with URIs
• Access with limited set of verbs
• Read - GET
• Write - PUT
• Invoke - POST
• Transfer resources as XML documents
• Stateless

7
Architecture - Contracts

• Typing/Semantics
• Contract list of URIs to template objects (is
  attribute)
• Prototype "inheritance"
• Mixins - multiple "inheritance"
• Tagging Semantic Web
• Taxonomy standard contracts
• Folksonomy vendor/user contracts

8
Architecture - Extendibility

• Embrace vendor specific extensions!
• Easy to mix together standard and vendor
  contracts
• Philosophically like Java/C
• Small fixed grammar (obj model/XML)
• Standard libraries (spec)
• Vendor libraries (everything else)

9
Architecture Protocol Bindings

• HTTP
• Read - GET
• Write - PUT
• Invoke POST
• SOAP
• Wrap read, write, invoke inside SOAP envelope
• XML Schema
• WSDL
• Security
• More
• Email (SMTP, POP3)
• Messaging (MQ, JMS)

10
Human Web (WWW)

• Assign every document a URL
• Wire documents together with URLs
• Standard document formats HTML, GIF, JPEG, SVG
• Semantics work in progress
• Search Google

11
M2M Web

• Assign every device an IP address and URL
• Assign every piece of data and service in a
  device a URL
• Wire data together via URLs
• Standard format oBIX documents
• Semantics oBIX contracts
• Search Google?

12
Standard Contracts

• Normalization
• Watches
• Points
• Histories
• Alarming

13
Watches

• Subscription
• Client makes watch via WatchService
• Add/Remove URIs to watch
• Client polls server for changes
• Leased

14
Points Point

• Normalized Points
• obixBoolPoint
• obixRealPoint
• obixEnumPoint
• obixStrPoint
• ltobj href"obixPoint"gt
• ltobj name"value"/gt
• ltobj name"status" is"obixStatus"/gt
• ltabstime name"timestamp" null"true"/gt
• lt/objgt

15
Points - Status

• ltobj href"obixStatus"gt
• ltbool name"overridden" val"false" /gt
• ltbool name"disabled" val"false" /gt
• ltbool name"fault" val"false" /gt
• ltbool name"down" val"false" /gt
• ltbool name"inAlarm" val"false" /gt
• ltbool name"unackedAlarm" val"false" /gt
• ltbool name"historyStart" val"false" /gt
• ltbool name"historyEnd" val"false" /gt
• lt/objgt

16
History

• obixHistory
• History.query
• History.rollup

17
Alarming

• obixAlarm
• obixStatefulAlarm
• obixAckAlarm
• obixAlarmSubject

18
Java oBIX Toolkit

• Open source Public Domain
• Obj API
• XML Encoder/Decoder
• ObixSession
• Obixc
• Swing Tool
• http//sourceforge.net/projects/obix

19
More Information

• http//obix.org/
• http//sourceforge.net/projects/obix