[[TOC()]]
= Using the Taverna interface =
This tutorial explain how to access XGAP from within the [http://taverna.sourceforge.net Taverna Workflow Workbench] using web services.
== Step 1: Get the webservice URL ==
Within the XGAP user interface:
 1. Go to "Programming interfaces".
[[Image(apis.png)]]
 2. Click the link at "Access using web services: use this WSDL file".
 1. Copy URL of the WSDL file from your browser, for example {{{http://localhost:8080/xgap_1_2_distro/api/soap?wsdl}}}.

== Step 2a: Add services to Taverna 1 ==
Now we will add the XGAP services to the Taverna service catalog. 

Inside the Taverna 2 workbench: 
 1. Right-click on 'Available processors' and select 'Add new WSDL scavenger'

[[Image(taverna1-1.png)]]

 2. Past the URL to the XGAP WSDL file, for example {{{http://localhost:8080/xgap_1_2_distro/api/soap?wsdl}}}, and click OK.

[[Image(taverna1-2.png)]]

 3. The XGAP webservice appears in the list and can now be used in your workflows.

[[Image(taverna1-3.png)]]

== Step 2b: Add services to Taverna 2 ==
Now we will add the XGAP services to the Taverna service catalog. 

Inside the Taverna 2 workbench:
 1. Click "Import new services", and select "WSDL Service".

[[Image(taverna2-1.png)]]

 2. Past the URL of the WSDL file in this box and click "Add".

[[Image(taverna2-2.png)]]

 3. The XGAP webservice appears in the list and can now be used in your workflows.

[[Image(taverna2-3.png)]]