annotation_service/commit

move ns decl into library file for explicit inclusion

diff --git a/api/annotation.pl b/api/annotation.pl
index 954b97a..70075f4 100644
--- a/api/annotation.pl
+++ b/api/annotation.pl
@@ -10,16 +10,7 @@
 :- use_module(library(graph_version)).
 :- use_module(components(label)).
 :- use_module(user(user_db)).
-
-% Namespace for package-specific extensions:
-:- rdf_register_ns(an,  'http://semanticweb.cs.vu.nl/annotate/').
-
-% Namespace for old open annotation model:
-:- rdf_register_ns(oac, 'http://www.openannotation.org/ns/').
-
-% Namespaces for new open annotation model. Warning: under development!
-:- rdf_register_ns(oa,  'http://www.w3.org/ns/openannotation/core/').      % The core Open Annotation model
-:- rdf_register_ns(oax,	'http://www.w3.org/ns/openannotation/extension/'). % Interoperable extensions to the core model
+:- use_module(library(oa_schema)).
 
 :- setting(login, boolean, true, 'Require login').
 :- setting(user_restrict, boolean, false,
diff --git a/config-available/oac_graphviz.pl b/config-available/oac_graphviz.pl
index ba3878c..264f722 100644
--- a/config-available/oac_graphviz.pl
+++ b/config-available/oac_graphviz.pl
@@ -1,6 +1,5 @@
 :- module(oac_graphviz, []).
 
-
 :- use_module(cliopatria(hooks)).
 :- use_module(library(semweb/rdf_db)).
 :- use_module(library(semweb/rdfs)).
@@ -8,7 +7,7 @@
 
 % Need these modules solely for their namespace declarations:
 :- use_module(library(graph_version)).
-:- use_module(api(annotation)).
+:- use_module(library(oa_schema)).
 
 :- rdf_meta
         graph_context_triple(r, t).
diff --git a/lib/oa_schema.pl b/lib/oa_schema.pl
new file mode 100644
index 0000000..82ad2c8
--- /dev/null
+++ b/lib/oa_schema.pl
@@ -0,0 +1,23 @@
+:- module(oa_schema, []).
+:- use_module(library(semweb/rdf_db)).
+:- use_module(library(semweb/rdf_library)).
+
+/** <module> Provide Open Annotation schema, namespace and visualization hooks.
+
+This module provides the OA schema and the  prefix =oa= and =oax= for use in
+Prolog.
+*/
+
+% Namespace for package-specific extensions:
+:- rdf_register_ns(an,  'http://semanticweb.cs.vu.nl/annotate/').
+
+% Namespace for old open annotation model:
+:- rdf_register_ns(oac, 'http://www.openannotation.org/ns/').
+
+% Namespaces for new open annotation model. Warning: under development!
+:- rdf_register_ns(oa,  'http://www.w3.org/ns/openannotation/core/').
+:- rdf_register_ns(oax,	'http://www.w3.org/ns/openannotation/extension/').
+
+:- rdf_attach_library(annotation_service(rdf)).
+% :- rdf_load_library(oa).
+