[libcatmandu-rdf-perl] 12/20: Fixing pod

[Jonas Smedegaard]

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js pushed a commit to annotated tag upstream/0.32
in repository libcatmandu-rdf-perl.

commit 091a1f847cea8b3cba8989a472a7ffbed0dc8fd6
Author: Patrick Hochstenbach <patrick.hochstenbach at ugent.be>
Date:   Sat Jul 29 11:21:02 2017 +0200

    Fixing pod
---
 lib/Catmandu/Importer/RDF.pm |  9 ++++++++-
 lib/Catmandu/RDF.pm          | 13 +++++++++----
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/lib/Catmandu/Importer/RDF.pm b/lib/Catmandu/Importer/RDF.pm
index 39a3517..8a443fa 100644
--- a/lib/Catmandu/Importer/RDF.pm
+++ b/lib/Catmandu/Importer/RDF.pm
@@ -285,7 +285,7 @@ sub _hashref_stream {
         my $value     = $triple->object->is_literal ?
                             $triple->object->literal_value :
                             $triple->object->is_blank ?
-                              $triple->object->blank_identifier :
+                              $triple->object->value :
                               $triple->object->uri_value;
         my $type      = lc $triple->object->type;
         my $lang      = $triple->object->is_literal ? $triple->object->literal_value_language : undef;
@@ -340,6 +340,13 @@ Command line client C<catmandu>:
 
   catmandu convert RDF --type ttl --file rdfdump.ttl to JSON
 
+  # For big input files it will be faster not to build a big hash in memory
+  # bit to return each triple fragment
+  catmandu convert RDF --type ttl --triples 1 --file rdfdump.ttl to JSON
+
+  # Transform back into NTriples
+  catmandu convert RDF --type ttl --triples 1 --file rdfdump.ttl to RDF --type NTriples
+
   # Query a SPARQL endpoint
   catmandu convert RDF --url http://dbpedia.org/sparql
                        --sparql "SELECT ?film WHERE { ?film dct:subject <http://dbpedia.org/resource/Category:French_films> }"
diff --git a/lib/Catmandu/RDF.pm b/lib/Catmandu/RDF.pm
index 8a28395..50c88f4 100644
--- a/lib/Catmandu/RDF.pm
+++ b/lib/Catmandu/RDF.pm
@@ -17,12 +17,12 @@ our %TYPE_ALIAS = (
 );
 
 has type => (
-    is => 'ro', 
+    is => 'ro',
     coerce => sub { my $t = ucfirst($_[0]); $TYPE_ALIAS{$t} // $t },
 );
 
 has ns => (
-    is => 'ro', 
+    is => 'ro',
     default => sub { RDF::NS->new },
     coerce => sub {
         return $_[0] if is_instance($_[0],'RDF::NS');
@@ -55,10 +55,15 @@ Catmandu::RDF - Modules for handling RDF data within the Catmandu framework
 
 Command line client C<catmandu>:
 
-  catmandu convert RDF --url http://dx.doi.org/10.2474/trol.7.147 
+  catmandu convert RDF --url http://dx.doi.org/10.2474/trol.7.147
                        --fix 'aref_query(dct_title,title)' to YAML
 
-  catmandu convert RDF --file rdfdump.nt to RDF --type turtle
+  catmandu convert RDF --file rdfdump.ttl to RDF --type turtle
+
+  # For big file the only efficient option to convert RDF is by
+  # transforming the input stream into triples and writing to NTriples
+  # in the output
+  catmandu convert convert RDF --triples 1 --type ttl to RDF --type NTriples < rdfdump.ttl
 
 See documentation of modules for more examples.
 

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