It took three days to write and one to document the Prolog RDF
parser. A significant part of the time was spent understanding the RDF
specification.
The size of the source (including comments) is given in the table
below.
| lines | words | bytes | file | function |
| 109 | 255 | 2663 | rdf.pl | Driver
program |
| 312 | 649 | 6416 | rdf_parser.pl | 1-st
phase parser |
| 246 | 752 | 5852 | rdf_triple.pl | 2-nd
phase parser |
| 126 | 339 | 2596 | rewrite.pl | rule-compiler |
| 793 | 1995 | 17527 | total | |
We also compared the performance using an RDF-Schema file generated
by
Protege-2000
and interpreted as RDF. This file contains 162 descriptions in 50
Kbytes, resulting in 599 triples. Environment: Intel Pentium-II/450 with
384 Mbytes memory running SuSE Linux 6.3.
The parser described here requires 0.15 seconds excluding 0.13
seconds Prolog startup time to process this file. The
Pro
Solutions parser (written in Perl) requires 1.5 seconds exluding
0.25 seconds startup time.
