server-side SLD support

[Paul Spencer]

Bart, I think a quick summary would be in order.  From what I have  
read, the options seem to be as follows (please feel free to add  
other options and elaborate on the pros and cons):

1. do not include SLD when saving the map file (the generated classes  
would be saved normally)

Pros:

  - implementation is straight forward
  - there are no side effects for existing applications and frameworks

Cons:

  - lose the original structure of the map file

2. include SLD when saving the map file (do not save the generated  
classes)

Pros:

  - maintain original structure of map file

Cons:

  - what to do with classes altered through mapscript
  - unintended side effects if remote (url) SLD changes during a  
user's session

Cheers

Paul

On 2-Nov-06, at 7:51 AM, Bart van den Eijnden (OSGIS) wrote:

> True.
>
> So in order to do this safely, we would need to have the concept of
> immutable classes in Mapserver, or not? I.e. classes the user  
> cannot change.
>
> Or are there other solutions?
>
> Best regards,
> Bart
>
> --
> Bart van den Eijnden
> OSGIS, Open Source GIS
> http://www.osgis.nl
>
>
> --------- Oorspronkelijk bericht --------
> Van: Daniel Morissette <dmorissette at MAPGEARS.COM>
> Naar: MAPSERVER-DEV at LISTS.UMN.EDU <MAPSERVER-DEV at LISTS.UMN.EDU>
> Onderwerp: Re: [UMN_MAPSERVER-DEV] server-side SLD support
> Datum: 02/11/06 10:40
>
>> Bart van den Eijnden (OSGIS) wrote:
>> &gt; Paul,
>> &gt;
>> &gt; the intention of the SLD keyword would be to be used in  
>> server-side
> WMS
>> &gt; implementations, to be used as the default style.
>> &gt;
>> &gt; So I would not recommend using it in Chameleon client MAP files.
>> &gt;
>> &gt; Maybe we are putting the scope of this too wide ..... ?
>> &gt;
>>
>> Once a feature is out in the wild then users will start using it  
>> for all
>> sorts of things that you never expected, and what you recommend  
>> them to
>> do or not do won't matter... i.e. even if you recommend to Chameleon
>> users to not use mapfiles that contain SLD refs, some of them will  
>> do it
>> either intentionally or by accident... that's why we need to  
>> address all
>> those questions now, to avoid making a half-baked feature  
>> available that
>> will cause odd side-effects to previously working applications.
>>
>> Daniel
>> -- 
>> Daniel Morissette
>> http://www.mapgears.com/
>>
>>

+-----------------------------------------------------------------+
|Paul Spencer                          pspencer at dmsolutions.ca    |
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|Chief Technology Officer                                         |
|DM Solutions Group Inc                http://www.dmsolutions.ca/ |
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