Use hyphen in uri to conform to URI rules

Author: raar1

fairworkflows/fairstep.py

@@ -437,7 +437,7 @@ def _modify_function(func):
         inputs = _extract_inputs_from_function(func)
         outputs = _extract_outputs_from_function(func)
 
-        func._fairstep = FairStep(uri='www.example.org/unpublished-'+func.__name__,
+        func._fairstep = FairStep(uri='http://www.example.org/unpublished-'+func.__name__,
                                   label=label,
                                   description=description,
                                   is_pplan_step=is_pplan_step,

fairworkflows/fairworkflow.py

@@ -95,6 +95,10 @@ def from_noodles_promise(cls, noodles_promise, description: str = None, label: s
                 to_uri = rdflib.URIRef(linked_step.uri + '#' + linked_var_name)
                 self._rdf.add((from_uri, namespaces.PPLAN.bindsTo, to_uri))
 
+                precedes_triple = (rdflib.URIRef(current_step.uri), namespaces.DUL.precedes, rdflib.URIRef(linked_step.uri))
+                if precedes_triple not in self._rdf:
+                    self._rdf.add(precedes_triple)
+
             if len(workflow.links[i]) == 0:
                 to_uri = rdflib.BNode('result')
                 self._rdf.add((from_uri, namespaces.PPLAN.bindsTo, to_uri))