[Qgis-user] QML reference, symbolize synonyms alike

[Schweitzer, Peter]

With many thanks to Richard McDonnell, his suggestion of using rules
instead of categories solved the problem I had.  The result is
http://mrdata.usgs.gov/geology/state/lithclass.qml with context
provided by http://mrdata.usgs.gov/geology/state/

I'm still a little puzzled by what's required and what is not required
in the QML file; I'm guessing that the solution would be to delve into
the QGIS source code, but it would be nice to have at least a
rudimentary document; I simply used the automatically-generated qml as
an example, then omitted a lot of things, but was pleased at how
simple I could make it and have it still work.

Thanks!

Peter

On Thu, Oct 15, 2015 at 6:46 AM, Richard McDonnell
<richard.mcdonnell at opw.ie> wrote:
> Peter
>
> I would advise you to use the QGIS rule based symbology to do what you
> require, the filter would be something like:-
>
> your attribute_column _name = 'carbonate rock' OR area_code = 'carbonate'
>
> keeping it simple!!
>
> This should do the trick for you.
> Regards,
>
> Richard.
>
>
> On 14/10/2015 17:20, Schweitzer, Peter wrote:
>
> Is there a QML reference document?
>
> What I really want to do is specify that two different category values
> will have the same symbol, like this:
> <category render="true" symbol="64" value="carbonate rock"
> label="Carbonate rock"/>
> <category render="true" symbol="64" value="carbonate" label="Carbonate
> rock"/>
> I want to read this as
>
> when the value of the attribute is EITHER "carbonate rock" OR
> "carbonate", render the feature using the symbol named "64"
>
> But this does not have the effect that I want, so I'm thinking
> incorrectly about how the QML file works.
>
> I would welcome advice on how to do what I want, or direction to the
> QML reference, or both.
>
> Thanks!
>
> Peter
>
>
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-- 
Peter N. Schweitzer (U.S. Geological Survey, Reston, VA 20192)
(703) 648-6533  email: pschweitzer at usgs.gov
http://geology.usgs.gov/peter/