Breaking down data silos with the open data protocol

Breaking Down “Data Silos” with the Open Data Protocol (OData)
Chris Woodruff

Who am I?
Chris Woodruff
MVP, Data Platform Development
Chris.Woodruff@rcmt.com
http://chriswoodruff.com
http://deepfriedbytes.com
http://nplus1.org
twitter @cwoodruff

Today, the tools for capturing data both at the mega-scale and at the milli-scale are just dreadful. After you have captured the data, you need to curate it before you can start doing any kind of data analysis, and we lack good tools for both data curationand data analysis.
Jim Gray
Quote

What is data now?

What could data be tomorrow?

An architectural style for building loosely coupled systems
defined by a set of very general constraints (principles)
the Web (URI/HTTP/HTML/XML) is an instance of this style
The Web used correctly (i.e., not using the Web as transport)
HTTP is built according to RESTful principles
services are built on top of Web standards without misusing them
most importantly, HTTP is an application protocol (not a transport protocol)
Anything that uses HTTP and XML (XML without SOAP)
XML-RPC was the first approach for this
violates REST because there is no uniform interface
REST: 3 definitions

The name Atom applies to a pair of related standards. The Atom Syndication Format is an XML language used for web feeds, while the Atom Publishing Protocol (AtomPub) is a simple HTTP-based protocol for creating and updating web resources.
ATOMPub

http://services.odata.org/OData/OData.svc
______________________________________/
|
service root URI
http://services.odata.org/OData/OData.svc/Category(1)/Products?$top=2&$orderby=name
______________________________________/ _________________/ ________________/
| | |
service root URI resource path query options
What is a URI?

Creation of standard Web API’s
Allow internal Information Workers to be more productive
Give IT staff more time to work on meaningful projects
Monetize/Open Data for others to use and benefit from
What are the benefits ofOData?

The beauty of Metadata

The Basics
Feeds, which are Collections of typed Entries
OData services can expose Service Operations
OData services expose all these constructs via URIs
OData service may also expose a Service Metadata Document

Datatypes

Full SQL like Query “Language”

How we get around OData
Query Navigation

Addressing entities and sets
Presentation options

Query Options

Filter Expressions

Filter Methods

Examples
http://.../OData.svc/GetProductsByRating?rating=5
Identifies the "GetProductsByRating" Service Operation and specifies a value of 5 for the "rating" input parameter.
Service Operations(Functions)

Where can we produce Odata?
WCF Data Services
WCF RIA Services

Create services directly from Visual Studio
Various data sources
Entity Framework
LINQ providers
Model-driven
Structural description in Entity Data Model
Metadata shapes service
HTTP
Hosting/HTTP listener
Service Runtime
IQueryable (+ IUpdatable)
Data Access Layer
Entity Framework
Custom LINQ provider
Relational database
Other sources

What do you need for WCF Data Services?
Visual Studio 2010
SQL Server 2008 SP1
ASP.NET 4.0
WCF Data Services Framework uses ASP.NET for Authentication and Authorization

Where can we consume Odata?
LINQ

Consuming from .NET Applications
Demo

Open your data for others

More Information
WCF Data Services Framework Home -- http://tinyurl.com/wcfdataservices
WCF Data Services Framework Team Blog -- http://blogs.msdn.com/astoriateam
ODataPrimer.com – http://odataprimer.com

Note about Internet Explorer
Note, Internet Explorer by default renders ATOM in a friendly format that makes OData feeds unreadable. To fix this, turn off IE feed viewing by turning off the option
Tools -> Internet Options -> Content -> Feeds (settings) -> Turn on feed viewing

Required Reading
Wrap up
The Fourth Paradigm: Data-Intensive Scientific Discovery

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Breaking down data silos with the open data protocol

by Chris Woodruff on Nov 05, 2010

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Breaking down data silos with the open data protocol — Presentation Transcript