| rapper − Raptor RDF parsing and serializing utility | 
| rapper [OPTIONS] INPUT-URI [INPUT-BASE-URI] | 
| rapper -o ntriples http://planetrdf.com/guide/rss.rdf rapper -i rss-tag-soup -o rss-1.0 pile-of-rss.xml http://example.org/base/ rapper --count http://example.org/index.rdf | 
| The rapper utility allows parsing of RDF content by the Raptor RDF parser toolkit emitting the results as RDF triples in a choice of syntaxes. The INPUT-URI can be a file name, ’-’ for standard input or if Raptor is built with a WWW retrieval library, a general URI. The optional INPUT-BASE-URI is used as the document parser base URI if present otherwise defaults to the IINPUT-URI. A value of ’-’ means no base URI. | 
| rapper uses the usual GNU command line syntax, with long options starting with two dashes (‘-’) if supported by the getopt_long function. Otherwise the short options are only available. | 
| −h, −−help | 
| Show a summary of the options. | 
| −i, −−input FORMAT | 
| Set the input FORMAT to one of ’rdfxml’ (RDF/XML, default), ’ntriples’ (N-Triples, see below), ’turtle’ (Turtle, see below) or ’rss-tag-soup’ (RSS Tag Soup). The RSS Tag Soup parser can turn the many XML RSS formats and Atom 0.3 into RDF triples. | 
| The list of parsers depends on how libraptor(3) was built. The list of supported parsers is given in the help summary given by −h. | 
| −I, −−input-uri URI | 
| Set the input/parser base URI or use value ’-’ for no base. The default is the INPUT-URI argument value. | 
| −o, −−output FORMAT | 
| Set the output FORMAT to ’ntriples’ (N-Triples, default), ’rdfxml’ (RDF/XML), ’rdfxml-abbrev’ (RDF/XML with abbreviations) or ’rss-1.0’ (RSS 1.0, also an RDF/XML syntax). | 
| The list of serializers depends on how libraptor(3) was built. The list of supported serializers is given in the help summary given by −h. | 
| −O, −−output-uri URI | 
| Set the output/serializer base URI or use value ’-’ for no base. The default is the input base uri, either set by the argument INPUT-BASE-URI or via options −I, −−input-uri URI | 
| −c, −−count | 
| Only count the triples and produce no other output. | 
| −e, −−ignore-errors | 
| Ignore errors, do not emit the messages and try to continue parsing. | 
| −f, −−feature FEATURE[=VALUE] | 
| Set a parser or serializer feature FEATURE to a value, or to 1 if VALUE is omitted, Use −f help to get lists of valid parser and serializer features. | 
| If the form −f ’xmlns:prefix="uri"’ is used, the prefix and namespace uri given will be set for serializing. The syntax matches XML in that either or both of prefix or uri can be omitted. | 
| −g, −−guess | 
| Guess the parser to use from the source-URI rather than use the −i FORMAT. | 
| −q, −−quiet | 
| No extra information messages. | 
| −r, −−replace-newlines | 
| Replace newlines in multi-line literals with spaces. | 
| −s, −−scan | 
| Scan for <rdf:RDF> element in the RDF/XML source content. | 
| −−show-graphs | 
| Print graph names (URIs) as they are seen in the input. This only has a meaning for parsers that support graph names such as the TRiG parser. | 
| −−show-namespaces | 
| Print namespaces as they are seen in the input. | 
| −t, −−trace | 
| Print URIs retrieved during parsing. Especially useful for monitoring what the guess and GRDDL parsers are doing. | 
| −w, −−ignore-warnings | 
| Ignore warnings, do not emit the messages. | 
| −v, −−version | 
| Print the raptor version and exit. | 
| rapper -q -i ntriples -o rdfxml -f ’xmlns:rss="http://purl.org/rss/1.0/"’ -f ’xmlns:ex="http://example.org/"’ tests/test.nt | 
| RDF/XML Syntax (Revised), W3C Recommendation, http://www.w3.org/TR/rdf-syntax-grammar/ N-Triples, in RDF Test Cases, Jan Grant and Dave Beckett (eds.) W3C Recommendation, http://www.w3.org/TR/rdf-testcases/#ntriples Turtle Terse RDF Triple Language, Dave Beckett, http://www.dajobe.org/2004/01/turtle/ RDF Site Summary (RSS) 1.0, 2000-12-06 http://purl.org/rss/1.0/spec | 
| libraptor(3),raptor-config(1) | 
| 1.4.16 | 
| Added -I/--input-uri and -O/--output-uri to set the input and output (parser and serializer) base URIs separately. | 
| 1.4.15 | 
| Added -t/--trace to do URI traces. | 
| 1.4.5 | 
| Updated to add serializer rdfxml-abbrev | 
| 1.4.3 | 
| Updated potential parser and serializers and described -f for defining namespaces. | 
| 1.3.0 | 
| Added −f for features. | 
| 1.1.0 | 
| Removed −a, −−assume since rdf:RDF is now always optional. | 
| Dave Beckett - http://www.dajobe.org/ | 
Copyright 2002-2008 Dave Beckett
2002-2008 University of Bristol