Defining a Constraint for a 2-Value Element

tclotworthy · February 23rd, 2011, 07:22 PM

Hello,

If I an XML structure that looks like:

- <sa:position>
- <gml:Point>
<gml:pos srsName="urn:ogc:def:crs:EPSG:4326">100.0 50.0</gml:pos>
</gml:Point>
</sa:position>

, how would constrain the latitude/longitude (in this case 50.0/100.0)? For instance, if I wanted the find an object with a latitude of < 100.0 and a longitude of < 50.0?

Any response is appreciated. thanks!

mhkay · February 23rd, 2011, 08:05 PM

If it's a schema-aware XSLT 2.0 transformation then the element will be atomized as a list of decimals and you can do

Code:

gml:pos[data(.)[1] lt 50 and data(.)[2] gt 100]

But sadly, I suspect it isn't.

Without it you're stuck with something like

Code:

gml:pos[number(substring-before(., ' ')) &lt; 50 and number (substring-after(., ' ')) &gt; 100]

tclotworthy · March 8th, 2011, 01:43 PM

thanks so much my friend. I used your hint some time ago, and forgot to respond. Indeed the second solution (not XSLT 2.0) worked great!

Always impressed with the time and energy you take for us.