Using the DAS/2.0 specification, this idea of "annotations of annotations" is easy to do. That's because every feature in DAS/2.0 has a unique URI and is therefore addressable by _any_ other system that uses URIs -- including another DAS/2.0 server:
<FEATURE uri="http://somewhere.else/feat123"; ... > <PROP key="my_thoughts_on_feat123" value="overexpressed in tissue XYZ" /> </FEATURE> Or if you prefer allowing your meta-annotation to have it's own URI: <FEATURE uri="http//my.server/feat123" ... > <PROP key="my_thoughts" value="overexpressed in tissue XYZ" /> <LINK href="http://somewhere.else/feat123"; rev="meta-annotation" /> </FEATURE> Used in this way DAS/2.0 becomes very RDF-like.. This is not just a happy accident but the result of a central tenet of DAS/2 -- addressability of all important DAS/2 entities outside the local system via URIs. The DAS/2 writeback spec is built on top of the DAS/2 retrieval spec, so if you're fully implementing the writeback spec you should be able to use this ability to do meta-annotations. Gregg P.S. It's great to see development starting up again on DAS writeback! On Wed, Oct 29, 2008 at 8:23 AM, Andy Jenkinson <[EMAIL PROTECTED]>wrote: > Forgot to send this to the list... > > -------- Original Message -------- > Subject: Re: [DAS] Writeback implementation > Date: Wed, 29 Oct 2008 09:56:53 +0000 > From: Andy Jenkinson <[EMAIL PROTECTED]> > Organisation: European Bioinformatics Institute > To: Gustavo Salazar <[EMAIL PROTECTED]> > References: <[EMAIL PROTECTED]> > > Hi Gustavo, > > The decentralised 'annotations of annotations' approach is a direction > that is likely to see most adoption in my opinion because it doesn't > require the original data provider to modify their source. > > Were you planning on using the existing "features" command in order to > retrieve the annotations, or something else? I ask because it's feasible > to imagine a DAS source that does not support writeback but still > annotates another source's annotations. In fact the DASMI architecture > already does this with it's scoring servers. > > Cheers, > Andy > > Gustavo Salazar wrote: > >> Hello everybody, >> >> This is my first post in this list, therefore I'm going to start to >> introduce myself. I'm Gustavo Salazar, I'm currently busy doing my MSc >> degree in computer science in the University of Cape Town - South Africa. >> The project that I'm working on is about the implementation of the >> writeback capabilities in the DAS client Dasty. >> My original Idea was to use as a server the writeback implementation >> created by Asia and Andreas. However i've been notice that this >> implementation works as an extra server and Dazzle is kind of middleman >> between the clients and the writeback (am I wrong?) which sound like a good >> idea in terms of independence, but it looks to me that it will be hard for a >> client to identify if a feature is original or has been edited. >> That's why I decided to explore others alternatives and now I started to >> work reimplementing the server DAS writeback capabilities not in Dazzle but >> in MyDas. >> I thing the writeback server should works as a meta-annotation server, >> which means that none of the modifications, additions or deletions will be >> actually changing the original server. in such a way a DAS client should see >> the information of the writeback as an extra layer, therefore it should >> first query regular DAS servers, built in memory the graphic, and at the end >> it will query the writeback server to modify this graphic with the community >> information. >> In this way the user can choose to use the wb information or not. >> I will use the protocol as in >> http://biodas.org/documents/das2/das2_writeback.html with the >> modifications that appears in the Asia's Theses. which implies the use of >> OpenId as the authorization system, I agree with the pros and and cons of >> OpenId that Andy posted, therefore if the consensus is to use another >> authorization system I will adapt my implementation. >> I will appreciate any comment or suggestions or if anybody wants more >> details of my ideas please no hesitate in ask me. >> >> Regards, >> >> -- >> Gustavo Salazar >> _______________________________________________ >> DAS mailing list >> [email protected] >> http://lists.open-bio.org/mailman/listinfo/das >> > > _______________________________________________ > DAS mailing list > [email protected] > http://lists.open-bio.org/mailman/listinfo/das > _______________________________________________ DAS mailing list [email protected] http://lists.open-bio.org/mailman/listinfo/das
