gnu: Add python-prov.

* gnu/packages/python-xyz.scm (python-prov): New variable.

gnu/packages/python-xyz.scm

@@ -168,6 +168,7 @@ (define-module (gnu packages python-xyz)
   #:use-module (gnu packages python-science)
   #:use-module (gnu packages python-web)
   #:use-module (gnu packages qt)
+  #:use-module (gnu packages rdf)
   #:use-module (gnu packages readline)
   #:use-module (gnu packages sdl)
   #:use-module (gnu packages search)
@@ -16278,6 +16279,34 @@ (define-public python-bagit
 preservation.")
     (license license:cc0)))
 
+(define-public python-prov
+  (package
+    (name "python-prov")
+    (version "2.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "prov" version))
+        (sha256
+         (base32
+          "1vi2fj31vygfcqrkimdmk52q2ldw08g9fn4v4zlgdfgcjlhqyhxn"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-dateutil" ,python-dateutil)
+       ("python-lxml" ,python-lxml)
+       ("python-networkx" ,python-networkx)
+       ("python-rdflib" ,python-rdflib)))
+    (native-inputs
+     `(("graphviz" ,graphviz)
+       ("python-pydot" ,python-pydot)))
+    (home-page "https://github.com/trungdong/prov")
+    (synopsis
+     "W3C Provenance Data Model supporting PROV-JSON, PROV-XML and PROV-O (RDF)")
+    (description
+     "This package provides a library for W3C Provenance Data Model supporting
+PROV-O (RDF), PROV-XML, PROV-JSON import/export.")
+    (license license:expat)))
+
 (define-public python-validators
   (package
     (name "python-validators")