SLD and ExternalGraphic formats

[Kralidis,Tom [Burlington]]

Hi,

We're using an SLD to custom symbolize some point data with an
ExternalGraphic ref, and resulting behaviour is as expected, until we
try to symbolize with ExternalGraphic.

Snippet below:

<ExternalGraphic>
 <OnlineResource xlink:type="simple"
xlink:href="http://eman-rese.ca/logos/gif/EMAN_colour_black_text.gif"/>
 <Format>GIF</Format>
</ExternalGraphic>

...however, when I change the Format element to "image/gif", the OGC:WMS
server (powered by MapServer) does not symbolize based on the
ExternalGraphic def.

When looking at latest CVS, mapogcsld.c, line 2146, it looks like they
take OGC:WMS 1.0.0 and 1.1.+ style of format defs (i.e. "GIF", "PNG",
"image/gif", "image/png"), but this is not evident in the GetMap output.

Examples:

Working SLD:

http://devgeo.cciw.ca/ms_tmp/pw7.sld

Working GetMap / SLD request:

http://www.eman-rese.ca/cgi-bin/mapserver/naturewatch.asp?SERVICE=WMS&VE
RSION=1.1.1&REQUEST=GetMap&SRS=EPSG%3A4326&BBOX=-125.2242339821858,20.95
844971963387,-36.22423397781418,76.58344972236614&WIDTH=560&HEIGHT=350&L
AYERS=plantwatch&STYLES=&FORMAT=image%2Fpng&BGCOLOR=0xFFFFFF&TRANSPARENT
=FALSE&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&sld=http://devgeo.cci
w.ca/ms_tmp/pw7.sld

Non-Working SLD (only difference is changing <Format>GIF</Format> to
<Format>image/gif</Format>

http://devgeo.cciw.ca/ms_tmp/pw8.sld

Non-Working GetMap / SLD request:

http://www.eman-rese.ca/cgi-bin/mapserver/naturewatch.asp?SERVICE=WMS&VE
RSION=1.1.1&REQUEST=GetMap&SRS=EPSG%3A4326&BBOX=-125.2242339821858,20.95
844971963387,-36.22423397781418,76.58344972236614&WIDTH=560&HEIGHT=350&L
AYERS=plantwatch&STYLES=&FORMAT=image%2Fpng&BGCOLOR=0xFFFFFF&TRANSPARENT
=FALSE&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&sld=http://devgeo.cci
w.ca/ms_tmp/pw8.sld

..Tom