Web Services Survey an Inventory

Background, Goals and Status

14th ESIP Federation Assembly MeetingRenaissance Mayflower Hotel

Washington, DC

January 4-6, 2005

Background and Purpose

There is a rapidly growing array of distributed services for accessing, processing, visualizing, cataloging, discovering or otherwise manipulating Earth Science information through computer-computer interfaces.

The landscape is currently obscured by the lack of a suitable inventory and by the hype associated with web services

Purposes of the WS Inventory/Survey• assess the size and characteristics of the computer-accessible (WS) resource pool• expose the main computer-computer WS linking protocols used and • get a rough assessment of the current WS usage environments.

Beneficiaries:ESIPInfusion DSWG workgroup

other DSWG workgroups, (e.g. Reuse and Standards)

It should also aid the creation and diffusion of ES knowledge for Achieving a Sustainable Planet (ESIP)

WS Inventory: Features and Approach

WS Inventory Survey Features

• Flexible to capture the varied WS technologies and their use environments

• Simple for easy participation

Approach to the WS Inventory Content Creation• The content of the WS Inventory collected from the community through a web-form.• Subsequent versions of this inventory could incorporate more specifics for service binding• The content could migrate to formal WS Discovery services such as GCMD, ECHO and

others.

Current task: Designing the web-form to be filled out by the participating members

Latest draft Web Service Inventory page on the Infusion WG websitehttp://www.sciencedatasystems.org/seeds/wg/infusion/Lists/Service%20Inventory/AllItems.aspx

Discussion thread for web-form design WS Invedntory Form Design by the WGhttp://www.sciencedatasystems.org/seeds/wg/infusion/Lists/Web%20Services%20Discussion/AllItems.aspx

Select the node in the thread Press Post Reply (remember to log in, so we know who you are).

Tech. Infusion WG, WS Subgroup

WS Inventory/Survey Discussion Thread

Draft WS Inventory Record

Draft WS Inventory Record

Draft WS Inventory

WS Inventory Form:

Description, Contact,Example

WS Inventory Form:

Interface, Clients, Tools

WS Inventory Form:

Functions, Topic (GCMD) Science

Domains

WS Inventory as an Open, Living Resource?

• Relationship to other Catalogs (Social Behavior)

– Not to be rude– Not just coexisting

– Cooperative, part of a value-chain

OpenDAP Cat

- Data collection through SDS SharePoint

- Inventory extension @ ESIP (SOAP)

- Usage at GCMD & EDCHO?

GCMD

ESIP CatOGC Cats

ECHO Google

• Stages of Cooperation– Open content for connection by others - sharing– Connecting through proxies & gateways

– Semantic Interoperability

Scope of Web Services Subgroup, 2005

1. Prepare an inventory of web services and their interfaces– The WS landscape is changing rapidly. New services are emerging – We need a snapshot of the service landscape, particularly in the REASoN projects – But what ‘services’ do we include? SOAP, OPeNDAP, OGC, files?

2. Assess WS architectures for data access AND analysis– We don't quite know how to link distributed WSs into coherent science applications – An open dialog on the linking/architectural issues would speed up the group

learning.– Issues: e.g. Architecture without rigid architecture

3. Demonstrate web service linking– Several REASoNs have a goal of facilitating satellite data flow and processing – A narrow pilot project could demonstrate satellite data

access/processing/analysis/delivery – Issues: Which REASoN projects? Data products? Services? Architecture(s)?

Further ideas/feedback on the scope of the WS subgroup will be appreciated.