On Jul 7, 2009, at 1:15 PM, Dominic Lowe wrote:

> Hi all, especially OWSLib commiters,
>
> There's a lot of new stuff that has gone into OWSLib recently  -  
> some of it is
> in the trunk and some is lurking in a branch yet to be merged with  
> the trunk.
> Most of it is still work in progress.
>
> In the trunk recent additions include:
>
> * CSW support
> * ISO 19115 metadata parsing (needed for CSW support I assume)
> * Several improvements to WCS support (caching, url checking)
> * OWSCommon classes to share between services
> * A general Utils module for common functions
>
> In branches/soswfsbranch there is also:
> * Support for WFS "2.0" (IS019142)
> * Support for SOS (sensor observation service)
>
>
> My preference would be to merge soswfsbranch into the trunk sooner  
> rather than
> later to prevent divergence - however this leaves the trunk with a lot
> of 'alpha' code in it (WFS2/SOS/CSW), compared to the more mature  
> WMS/WFS1
> and WCS support.
>
> What do people think about this?
>
> Should we just accept that some of the services are better supported  
> than
> others and release them all anyway, say as OWSLib version 3.5 or 4.0 ?
>
> Or should we just carry on as is in the trunk without a new release  
> - the
> downside being that improvements/patches such as the WCS patches  
> don't get
> released onto Pypi  for a while.
>
> Or should be make an effort to branch off code into stable and  
> unstable
> branches and move modules across individually when 'ready' (whatever  
> ready
> means)?
>
> Or should we perhaps package some things within OWSlib as  
> experimental modules
> e.g. "owslib.experimental.sos" and move them across when 'ready'.
>
> There are pros and cons to each of these. Are there other options we  
> should
> consider?
>
> My preference is to take the simple option and put everything in the  
> trunk and
> put out a new release with the caveat that some services are better  
> developed
> than others.  Of course we'd need to run the tests and creating new  
> ones
> where needed.
>
> My concern about having stable and unstable branches and therefore  
> waiting for
> code to be 'finished' is that we don't have much development effort  
> on this
> project - a few people do a bit here and there but only as time  
> allows. I'm
> not sure things will ever be finished as such, just improved upon. I  
> think
> the incremental approach is therefore going to suit the project  
> better.
>
> If something is really unstable then yes it should probably be in a  
> branch
> temporarily, but I think the default approach should be to get code  
> into the
> trunk (and version released) sooner rather than later.
>
> Anyway, it's up for discussion, what do others think?
>
> Cheers,
>
> Dom

I'm +1 with an incremental approach and getting code into the trunk  
quickly.

Another release strategy to consider is to make owslib a namespace  
package, and separately distribute owslib.wms, owslib.wfs, etc.

Before we make more releases, let's revisit the interfaces that Dom  
and I came up with (interfaces.py) and make sure the SOS and CSW stuff  
implement them. The interfaces themselves may need some adjustment to  
accomodate.

Sean

--
Sean Gillies
Software Engineer
Institute for the Study of the Ancient World
New York University

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