=== FileSource

A `<FileSource>` can be used as a child of `<Map>` to declare named directory paths
that then can be referred to as `base` attribute in for files to read by data sources `file`, like e.g. the `CSV` and `GeoJSON` ones,
and for symbolizers that are able to load image files, like e.g. `<PointSymbolizer>`, `<LinePatternSymbolizer>` etc.

.FileSource attributes
[options="header",cols="m,d,d,d"]
|====================
| Attribute | Value | Default | Description
| name | string | none |  
|====================

.FileSource DataSource example
====
The actual file to be processed in the example below will be taken from `path/to/csv-data/file.csv`:

[source,xml]
----
<Map>
  <FileSource name='csv-base'>path/to/csv-data</FileSource>
  [...]
  <DataSource>
    <Parameter name="type">csv</Parameter>
    <Paramater name="base">csv-base</Parameter>
    <Parameter name="file">file.csv</Parameter>
  </DataSource>
  [...]
</Map>
----
====

.FileSource Symbolizer example
====
The actual symbol file being used in the example below will be taken from `path/to/symbols/symbol.svg`:

[source,xml]
----
<Map>
  <FileSource name='symbols'>path/to/symbols</FileSource>
  [...]
  <PointSymbolizer base='symbols' file='symbol.svg'/>
  [...]
</Map>  
----
====