[DAS] Registry and Sanger new features/developments

[Jonathan Warren]

The registry has some new features:

Cross Origin Resource Sharing (CORS) headers are now tested by the  
registry: The http://www.dasregistry.org/das/sources response has  
<PROP name="cors" value="probably_valid"/> or <PROP name="cors"  
value="valid"/> for data sources that have the correct header ("Access- 
Control-Allow-Origin:*"). These headers should make it easier for  
JavaScript based DAS clients to make requests from DAS sources using  
ajax and alleviate the need for proxy use for cross client requests.  
The registry web service responses also have cors headers.

16 of the many UCSC sources are now available in the registry (created  
via a sources document at www.dasregistry.org/ucsc/das/sources). Note  
that currently clients will want to filter these sources using types  
filters as the UCSC sources work slightly differently to most of the  
sources available in the registry. Each UCSC source effectively  
contains many tracks (we are currently working with the UCSC to change  
this).  However if the DAS specification is adhered to both clients  
and servers should support the types filtering anyway.

New web service requests available for clients to interact with the  
registry:
* added rows capability for the sources cmd http://www.dasregistry.org/das/sources?rows=1-2 
  returns the first two sources with a number for the total sources  
available and the start and end rows/numbers requested
* extra command for registry dasregistry/das/knownCapabilities shows  
what capabilities are known to the registry.
* added keywords parameter to sources cmds e.g. http://www.dasregistry.org/das/sources?keywords=zebrafish 
  will filter by sources that contain the keywords zebrafish
* added keywords parameter to coordinatesystem command http://www.dasregistry.org/das/coordinatesystem?keywords=gorilla
* added total, start, end attributes to coordinatesystem request  
response if rows specified http://www.dasregistry.org/das/coordinatesystem?keywords=gene&rows=1-10

A sources document exists for the sanger das sources here http://das.sanger.ac.uk/das/sources 
  which contains all the recent sources that have a valid coordinate  
systems and should make it easier for clients to interact with the  
many sanger das sources.

For any more information please don't hesitate to contact me or read  
my blog at http://biodasman.wordpress.com

Thanks

Jonathan.


Jonathan Warren
Senior Developer and DAS coordinator
blog: http://biodasman.wordpress.com/
jonathan.warren at sanger.ac.uk











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