You can now use relative paths when browsing for file URIs.

src/blenderbim/blenderbim/bim/__init__.py

@@ -79,17 +79,18 @@ for name in modules.keys():
 
 
 classes = [
-    operator.OpenUri,
+    operator.AddIfcFile,
-    operator.SelectDataDir,
-    operator.SelectSchemaDir,
-    operator.SelectIfcFile,
-    operator.OpenUpstream,
     operator.BIM_OT_add_section_plane,
     operator.BIM_OT_remove_section_plane,
-    operator.ReloadIfcFile,
-    operator.AddIfcFile,
-    operator.RemoveIfcFile,
     operator.ConfigureVisibility,
+    operator.OpenUpstream,
+    operator.OpenUri,
+    operator.ReloadIfcFile,
+    operator.RemoveIfcFile,
+    operator.SelectDataDir,
+    operator.SelectIfcFile,
+    operator.SelectSchemaDir,
+    operator.SelectURIAttribute,
     prop.StrProperty,
     prop.ObjProperty,
     prop.Attribute,

src/blenderbim/blenderbim/bim/operator.py

@@ -22,6 +22,7 @@ import json
 import webbrowser
 import ifcopenshell
 import blenderbim.bim.handler
+import blenderbim.tool as tool
 from . import schema
 from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.ui import IFCFileSelector
@@ -44,8 +45,9 @@ class SelectURIAttribute(bpy.types.Operator):
     bl_label = "Select URI Attribute"
     bl_options = {"REGISTER", "UNDO"}
     bl_description = "Select a local file"
-    data_path: bpy.props.StringProperty(name="Data Path")
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
+    data_path: bpy.props.StringProperty(name="Data Path")
+    use_relative_path: bpy.props.BoolProperty(name="Use Relative Path", default=False)
 
     def execute(self, context):
         # data_path contains the latter half of the path to the string_value property
@@ -64,7 +66,10 @@ class SelectURIAttribute(bpy.types.Operator):
                     # Do you know a better way?
                     pass
         if attribute:
-            attribute.string_value = self.filepath
+            filepath = self.filepath
+            if self.use_relative_path:
+                filepath = os.path.relpath(filepath, os.path.dirname(tool.Ifc.get_path()))
+            attribute.string_value = filepath
         return {"FINISHED"}
 
     def invoke(self, context, event):

src/blenderbim/test/tool/test_document.py

@@ -188,7 +188,7 @@ class TestImportReferences(NewFile):
         assert len(props.documents) == 1
         assert props.documents[0].ifc_definition_id == reference.id()
         assert props.documents[0].name == "Unnamed"
-        assert props.documents[0].identification == "X"
+        assert props.documents[0].identification == "*"
         assert props.documents[0].is_information is False
 
 

src/ifcopenshell-python/ifcopenshell/api/document/add_reference.py

@@ -25,8 +25,6 @@ class Usecase:
             self.settings[key] = value
 
     def execute(self):
-        id_attribute = "ItemReference" if self.file.schema == "IFC2X3" else "Identification"
+        if self.file.schema == "IFC2X3":
-        attributes = {id_attribute: "X"}
+            return self.file.create_entity("IfcDocumentReference")
-        if self.file.schema != "IFC2X3":
+        return self.file.create_entity("IfcDocumentReference", ReferencedDocument=self.settings["information"])
-            attributes["ReferencedDocument"] = self.settings["information"]
-        return self.file.create_entity("IfcDocumentReference", **attributes)