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Updated Path Expression (markdown)

springmeyer 2012-08-27 08:51:00 -07:00
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Path-Expression.md

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It is an expression type that has been refined and simplified to use for file system paths. It is an expression type that has been refined and simplified to use for file system paths.
It allows normal, static paths like `/path/to/file.png` but also dynamically constructed paths like: `/path/to/[field].png` so that for every symbolizer rendered the image/svg file path lookup would change depending on the value of a given data field, in this case an attribute called `field`. It allows normal, static paths like `/path/to/file.png` but also dynamically constructed paths like: `/path/to/[field].png` so that for every symbolizer rendered the image/svg file path lookup would change depending on the value of a given data field, in this case an attribute called `field`.
For more info see: http://mapnik.org/news/2009/12/08/future_mapnik2/