For those interested, this actually seems to be a limitation of the
"concatenate" function rather than a more generic labelling/SLD issue.
This doesn't work (instead it strips out the space):
> <se:Label>
> <ogc:Function name="Concatenate">
> <ogc:PropertyName>NAME</ogc:PropertyName>
> <ogc:Literal> (</ogc:Literal>
> <ogc:PropertyName>ELEC_2020</ogc:PropertyName>
> <ogc:Literal>)</ogc:Literal>
> </ogc:Function>
> </se:Label>
However, I just came across the help for this -
http://docs.geoserver.org/stable/en/user/styling/sld-reference/labeling.html#composing-labels-from-multiple-attributes-
and so tried that version:
<se:Label>
> <ogc:PropertyName>NAME</ogc:PropertyName> (<
> ogc:PropertyName>UPRN</ogc:PropertyName>)
> </se:Label>
So it seems that trying to do it "properly", i.e. by glueing together the
components is actually the wrong way to do it.
Cheers,
Jonathan
On 29 April 2014 18:01, Jonathan Moules
<[email protected]>wrote:
> Hi Andrea,
> Thanks for the information.
>
> Alas it doesn't appear to work with SLD 1.1. Is that a spec thing or a
> implementation thing? (I tried a quick search in the specs, but "CDATA"
> didn't find much of anything in either the 1.0 or 1.1 so I guess it's
> defined in some other way).
>
> If the later I'll investigate getting it sponsored as it'll improve our
> labelling considerably. :-)
>
> Many thanks,
> Jonathan
>
>
>
>
> On 29 April 2014 17:36, Andrea Aime <[email protected]> wrote:
>
>> On Tue, Apr 29, 2014 at 6:19 PM, Jonathan Moules <
>> [email protected]> wrote:
>>
>>> Hi List,
>>> I'm wondering about using spaces (" ") in labels.
>>>
>>> I'm trying to form a label of two concatenated properties, with the
>>> output looking like:
>>>
>>> *Property1 (Property2)*
>>>
>>>> <se:Label>
>>>> <ogc:Function name="Concatenate">
>>>> <ogc:PropertyName>NAME</ogc:PropertyName>
>>>> <ogc:Literal> (</ogc:Literal>
>>>> <ogc:PropertyName>ELEC_2020</ogc:PropertyName>
>>>> <ogc:Literal>)</ogc:Literal>
>>>> </ogc:Function>
>>>> </se:Label>
>>>
>>>
>>> But the output of that is:
>>> *Property1(Property2)*
>>>
>>> Note the lack of space character before the "(". I tried using " ",
>>> but that resulted in an exception.
>>>
>>> After more testing, I ended up at the extreme end:
>>>
>>>> <se:Label>
>>>> <ogc:Function name="Concatenate">
>>>> <ogc:PropertyName>NAME</ogc:PropertyName>
>>>> <ogc:Literal> - - - - - (</ogc:Literal>
>>>> <ogc:PropertyName>ELEC_2020</ogc:PropertyName>
>>>> <ogc:Literal>)</ogc:Literal>
>>>> </ogc:Function>
>>>> </se:Label>
>>>
>>>
>>> The output of which is:
>>> *Property1*- - - - - *(Property2)*
>>> Again, note the lack of space between Property1 and the first non-space
>>> character.
>>>
>>> Is this meant to happen, am I doing something wrong, or is it a bug? I
>>> know in HTML it will only ever show a single space character unless they're
>>> declared explicitly with " " irrespective of how many are in the code,
>>> but this seems to be left-trimming only.
>>>
>>
>> Meant to happen, by SLD spec, we have to eat away the spaces.
>> All you can do to preserve them is to wrap them in a CDATA section:
>>
>> <se:Label>
>> <ogc:Function name="Concatenate">
>> <ogc:PropertyName>NAME</ogc:PropertyName>
>> <ogc:Literal><![CDATA[ (]]></ogc:Literal>
>> <ogc:PropertyName>ELEC_2020</ogc:PropertyName>
>> <ogc:Literal>)</ogc:Literal>
>> </ogc:Function>
>> </se:Label>
>>
>> The CDATA trick should work with SLD 1.0, with SLD 1.1, not sure
>>
>> Cheers
>> Andrea
>>
>>
>> --
>> ==
>> Meet us at GEO Business 2014! in London! Visit http://goo.gl/fES3aK
>> for more information.
>> ==
>>
>> Ing. Andrea Aime
>> @geowolf
>> Technical Lead
>>
>> GeoSolutions S.A.S.
>> Via Poggio alle Viti 1187
>> 55054 Massarosa (LU)
>> Italy
>> phone: +39 0584 962313
>> fax: +39 0584 1660272
>> mob: +39 339 8844549
>>
>> http://www.geo-solutions.it
>> http://twitter.com/geosolutions_it
>>
>> -------------------------------------------------------
>>
>
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