Often, when encountering a new language, it is interesting to look at sample code, even if the code in question is not fully comprehensible at first. Here are a few links:
Brief samples are provided with the online expression evaluator.
A simple illustrative CGI script for displaying the titles of an RSS 1.0 feed: http://fabl.net/examples/rsstitles.fbl
A sample run of this script:
http://fabl.net/examples/rsstitles.fsp?src=http://www.mapbureau.com/userdata/donalda/worstplacesforjournalists/data.xml
Definitions of RDF geometry vocabularies: http://fabl.net/lib/geometry/1.1/revision1.fbl and http://fabl.net/lib/geometry2d/1.1/revision1.fbl
A few geometric utilities:
http://fabl.net/lib/libgeom2d/1.1/point.v0.fbl
http://fabl.net/lib/libgeom2d/1.1/box.v1.fbl
http://fabl.net/lib/libgeom2d/1.1/matrix.v0.fbl
http://fabl.net/lib/libgeom2d/1.1/polyline.v0.fbl
http://fabl.net/lib/libgeom2d/1.1/group.v0.fbl
RDFMapper is a web service implemented in Fabl for mapping geo-annotated RDF content. RDFMapper provides parameters that allow users to define their own Fabl functions for extraction of location data and generation of HTML content.
Utilities for use with RDFMapper: http://fabl.net/examples/rdfmapper_utils-2.0.fbl
The Fabl parser: http://fabl.net/fimp/parse.fbl
The rest of the self-implemented portion of Fabl can be found in the directory <installDir>/fimp (fimp stands for Fabl IMPlementation).