Tuesday, July 21, 2009

OpenNode2 integrates Exchange Network Discovery Service (ENDS)

Just three months after the release of OpenNode2 comes an upgraded version - with some major new features like Exchange Network Discovery Service (ENDS) integration.

OpenNode2 is now capable of automatically registering an agency's Exchange Network (EN)presence and capabilities with the recently released national ENDS repository housed at EPA. ENDS is implemented as a set of services complying to the Exchange Network protocols - and the repository lets consumers of Network data discover which agencies have operational Nodes, and what data they are able to exchange via those Nodes.

The ENDS v1.3 exchange defines several Query services to retreive these lists of Nodes and services:

GetDataServices - returns ENDS_DataServices
GetSchemaList - returns ENDS_NetworkSchemaList
GetRequestList - returns ENDS_RequestList
GetStyleSheetList - returns ENDS_NetworkStyleSheetList
GetParametersList - returns ENDS_ParameterList
GetExampleList - returns ENDS_NodeExampleList

The six common data service payloads can be used to update data within the exchange just as they are used to consume data about the exchange. ENDS version 2.0 updated this approach to address issues raised by the EN community and align with OpenNode2.

With the release of OpenNode2 the Exchange Network has been gaining momentum - and the ENDS repository may become an essential tool to ensure that the community is aware of the Network's ongoing expansion.

- Jeff
(NSDI + NEIEN) x GeoWeb = NSDI 2.0


At 7/22/2009 12:52:00 PM, Anonymous Anonymous said...

It has been discussed that a next step in harmonizing the Exchange Network with the larger world of OGC services might be to teach ENDS to also speak OGC Catalog Services for the Web (CSW) and the EN publishing services to have a WMS/WFS broker built into them.

At 7/24/2009 07:52:00 AM, Blogger Jeff Harrison said...

Yep, this seems reasonable. Teaching ENDS to speak CSW would seem to be an exercise in crosswalking the ENDS and CSW query operations to develop a harmonized interface, implementable on ENDS to allow integrated queries.

At 7/29/2009 03:55:00 AM, Anonymous Photogrammetry services said...

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