Fix #2364. Bug where classifications couldn't be added in IFC2X3.

src/blenderbim/blenderbim/bim/ifc.py

@@ -39,6 +39,8 @@ class IfcStore:
     edited_objs = set()
     pset_template_path = ""
     pset_template_file = None
+    classification_path = ""
+    classification_file = None
     library_path = ""
     library_file = None
     element_listeners = set()

src/blenderbim/blenderbim/bim/module/classification/__init__.py

@@ -20,18 +20,19 @@ import bpy
 from . import ui, prop, operator
 
 classes = (
-    operator.LoadClassificationLibrary,
     operator.AddClassification,
-    operator.RemoveClassification,
-    operator.EnableEditingClassification,
-    operator.DisableEditingClassification,
-    operator.EditClassification,
-    operator.RemoveClassificationReference,
-    operator.EnableEditingClassificationReference,
-    operator.DisableEditingClassificationReference,
-    operator.EditClassificationReference,
     operator.AddClassificationReference,
     operator.ChangeClassificationLevel,
+    operator.DisableEditingClassification,
+    operator.DisableEditingClassificationReference,
+    operator.DisableEditingClassificationReferences,
+    operator.EditClassification,
+    operator.EditClassificationReference,
+    operator.EnableEditingClassification,
+    operator.EnableEditingClassificationReference,
+    operator.LoadClassificationLibrary,
+    operator.RemoveClassification,
+    operator.RemoveClassificationReference,
     prop.ClassificationReference,
     prop.BIMClassificationProperties,
     prop.BIMClassificationReferenceProperties,

src/blenderbim/blenderbim/bim/module/classification/data.py

@@ -0,0 +1,91 @@
+# BlenderBIM Add-on - OpenBIM Blender Add-on
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of BlenderBIM Add-on.
+#
+# BlenderBIM Add-on is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# BlenderBIM Add-on is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+import ifcopenshell
+import ifcopenshell.util.date
+import ifcopenshell.util.classification
+import blenderbim.tool as tool
+from blenderbim.bim.ifc import IfcStore
+
+
+def refresh():
+    ClassificationsData.is_loaded = False
+    ClassificationReferencesData.is_loaded = False
+
+
+class ClassificationsData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.is_loaded = True
+        cls.data["has_classification_file"] = cls.has_classification_file()
+        cls.data["classifications"] = cls.classifications()
+        cls.data["available_classifications"] = cls.available_classifications()
+
+    @classmethod
+    def has_classification_file(cls):
+        return bool(IfcStore.classification_file)
+
+    @classmethod
+    def classifications(cls):
+        results = []
+        for element in tool.Ifc.get().by_type("IfcClassification"):
+            data = element.get_info()
+            if IfcStore.classification_file.schema == "IFC2X3" and element.EditionDate:
+                data["EditionDate"] = ifcopenshell.util.date.ifc2datetime(data["EditionDate"])
+            results.append(data)
+        return results
+
+    @classmethod
+    def available_classifications(cls):
+        if not IfcStore.classification_file:
+            return []
+        return [(str(e.id()), e.Name, "") for e in IfcStore.classification_file.by_type("IfcClassification")]
+
+
+class ClassificationReferencesData:
+    data = {}
+    is_loaded = False
+
+    @classmethod
+    def load(cls):
+        cls.is_loaded = True
+        cls.data["references"] = cls.references()
+        cls.data["is_available_classification_added"] = cls.is_available_classification_added()
+
+    @classmethod
+    def references(cls):
+        results = []
+        element = tool.Ifc.get_entity(bpy.context.active_object)
+        if element:
+            for reference in ifcopenshell.util.classification.get_references(element):
+                data = reference.get_info()
+                del data["ReferencedSource"]
+                results.append(data)
+        return results
+
+    @classmethod
+    def is_available_classification_added(cls):
+        if not IfcStore.classification_file or not IfcStore.classification_file.by_type("IfcClassification"):
+            return False
+        props = bpy.context.scene.BIMClassificationProperties
+        name = IfcStore.classification_file.by_id(int(props.available_classifications)).Name
+        return name in [e.Name for e in tool.Ifc.get().by_type("IfcClassification")]

src/blenderbim/blenderbim/bim/module/classification/operator.py

@@ -1,5 +1,5 @@
 # BlenderBIM Add-on - OpenBIM Blender Add-on
-# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
+# Copyright (C) 2020-2022 Dion Moult <dion@thinkmoult.com>
 #
 # This file is part of BlenderBIM Add-on.
 #
@@ -18,46 +18,40 @@
 
 import bpy
 import json
+import ifcopenshell
 import ifcopenshell.api
+import blenderbim.tool as tool
+import blenderbim.bim.helper
 from blenderbim.bim.ifc import IfcStore
-from ifcopenshell.api.classification.data import Data
-from blenderbim.bim.module.classification.prop import getClassifications, getReferences
 
 
-class LoadClassificationLibrary(bpy.types.Operator):
+class LoadClassificationLibrary(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.load_classification_library"
     bl_label = "Load Classification Library"
     filename_ext = ".ifc"
     filter_glob: bpy.props.StringProperty(default="*.ifc;*.ifczip;*.ifcxml", options={"HIDDEN"})
     filepath: bpy.props.StringProperty(subtype="FILE_PATH")
 
-    def execute(self, context):
-        Data.load_library(self.filepath)
-        getClassifications(self, context)
-        return {"FINISHED"}
-
     def invoke(self, context, event):
         context.window_manager.fileselect_add(self)
         return {"RUNNING_MODAL"}
 
+    def _execute(self, context):
+        IfcStore.classification_file = ifcopenshell.open(self.filepath)
 
-class AddClassification(bpy.types.Operator):
+
+class AddClassification(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.add_classification"
     bl_label = "Add Classification"
     bl_options = {"REGISTER", "UNDO"}
 
-    def execute(self, context):
-        return IfcStore.execute_ifc_operator(self, context)
-
     def _execute(self, context):
         props = context.scene.BIMClassificationProperties
         ifcopenshell.api.run(
             "classification.add_classification",
-            IfcStore.get_file(),
+            tool.Ifc.get(),
-            **{"classification": Data.library_file.by_id(int(props.available_classifications))},
+            classification=IfcStore.classification_file.by_id(int(props.available_classifications)),
         )
-        Data.load(IfcStore.get_file())
-        return {"FINISHED"}
 
 
 class EnableEditingClassification(bpy.types.Operator):
@@ -67,19 +61,21 @@ class EnableEditingClassification(bpy.types.Operator):
     classification: bpy.props.IntProperty()
 
     def execute(self, context):
+        def callback(name, prop, data):
+            if name == "ReferenceTokens":
+                new = bpy.context.scene.BIMGeoreferenceProperties.projected_crs.add()
+                new.name = name
+                new.data_type = "string"
+                new.is_null = data[name] is None
+                new.is_optional = True
+                new.string_value = "" if new.is_null else json.dumps(data[name])
+                return True
+
         props = context.scene.BIMClassificationProperties
         props.classification_attributes.clear()
-        classification_data = Data.classifications[self.classification]
+        blenderbim.bim.helper.import_attributes2(
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcClassification").all_attributes():
+            tool.Ifc.get().by_id(self.classification), props.classification_attributes, callback
-            new = props.classification_attributes.add()
+        )
-            new.name = attribute.name()
-            new.is_null = classification_data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = "string"
-            if attribute.name() == "ReferenceTokens":
-                new.string_value = "" if new.is_null else json.dumps(classification_data[attribute.name()])
-            else:
-                new.string_value = "" if new.is_null else classification_data[attribute.name()]
         props.active_classification_id = self.classification
         return {"FINISHED"}
 
@@ -94,34 +90,26 @@ class DisableEditingClassification(bpy.types.Operator):
         return {"FINISHED"}
 
 
-class RemoveClassification(bpy.types.Operator):
+class RemoveClassification(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.remove_classification"
     bl_label = "Remove Classification"
     bl_options = {"REGISTER", "UNDO"}
     classification: bpy.props.IntProperty()
 
-    def execute(self, context):
-        return IfcStore.execute_ifc_operator(self, context)
-
     def _execute(self, context):
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "classification.remove_classification",
-            self.file,
+            tool.Ifc.get(),
-            **{"classification": self.file.by_id(self.classification)},
+            classification=self.file.by_id(self.classification),
         )
-        Data.load(IfcStore.get_file())
-        return {"FINISHED"}
 
 
-class EditClassification(bpy.types.Operator):
+class EditClassification(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.edit_classification"
     bl_label = "Edit Classification"
     bl_options = {"REGISTER", "UNDO"}
 
-    def execute(self, context):
-        return IfcStore.execute_ifc_operator(self, context)
-
     def _execute(self, context):
         props = context.scene.BIMClassificationProperties
         attributes = {}
@@ -138,9 +126,7 @@ class EditClassification(bpy.types.Operator):
             self.file,
             **{"classification": self.file.by_id(props.active_classification_id), "attributes": attributes},
         )
-        Data.load(IfcStore.get_file())
         bpy.ops.bim.disable_editing_classification()
-        return {"FINISHED"}
 
 
 class EnableEditingClassificationReference(bpy.types.Operator):
@@ -154,16 +140,7 @@ class EnableEditingClassificationReference(bpy.types.Operator):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         props = obj.BIMClassificationReferenceProperties
         props.reference_attributes.clear()
-        reference_data = Data.references[self.reference]
+        blenderbim.bim.helper.import_attributes2(tool.Ifc.get().by_id(self.reference), props.reference_attributes)
-        for attribute in IfcStore.get_schema().declaration_by_name("IfcClassificationReference").all_attributes():
-            if attribute.name() == "ReferencedSource":
-                continue
-            new = props.reference_attributes.add()
-            new.name = attribute.name()
-            new.is_null = reference_data[attribute.name()] is None
-            new.is_optional = attribute.optional()
-            new.data_type = "string"
-            new.string_value = "" if new.is_null else reference_data[attribute.name()]
         props.active_reference_id = self.reference
         return {"FINISHED"}
 
@@ -180,41 +157,30 @@ class DisableEditingClassificationReference(bpy.types.Operator):
         return {"FINISHED"}
 
 
-class RemoveClassificationReference(bpy.types.Operator):
+class RemoveClassificationReference(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.remove_classification_reference"
     bl_label = "Remove Classification Reference"
     bl_options = {"REGISTER", "UNDO"}
     reference: bpy.props.IntProperty()
     obj: bpy.props.StringProperty()
 
-    def execute(self, context):
-        return IfcStore.execute_ifc_operator(self, context)
-
     def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         self.file = IfcStore.get_file()
         ifcopenshell.api.run(
             "classification.remove_reference",
             self.file,
-            **{
+            reference=self.file.by_id(self.reference),
-                "reference": self.file.by_id(self.reference),
+            product=self.file.by_id(obj.BIMObjectProperties.ifc_definition_id),
-                "product": self.file.by_id(obj.BIMObjectProperties.ifc_definition_id),
-            },
         )
-        Data.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
-        Data.load(IfcStore.get_file())
-        return {"FINISHED"}
 
 
-class EditClassificationReference(bpy.types.Operator):
+class EditClassificationReference(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.edit_classification_reference"
     bl_label = "Edit Classification Reference"
     bl_options = {"REGISTER", "UNDO"}
     obj: bpy.props.StringProperty()
 
-    def execute(self, context):
-        return IfcStore.execute_ifc_operator(self, context)
-
     def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         props = obj.BIMClassificationReferenceProperties
@@ -228,48 +194,37 @@ class EditClassificationReference(bpy.types.Operator):
         ifcopenshell.api.run(
             "classification.edit_reference",
             self.file,
-            **{"reference": self.file.by_id(props.active_reference_id), "attributes": attributes},
+            reference=self.file.by_id(props.active_reference_id), attributes=attributes,
         )
-        Data.load(IfcStore.get_file())
         bpy.ops.bim.disable_editing_classification_reference()
-        return {"FINISHED"}
 
 
-class AddClassificationReference(bpy.types.Operator):
+class AddClassificationReference(bpy.types.Operator, tool.Ifc.Operator):
     bl_idname = "bim.add_classification_reference"
     bl_label = "Add Classification Reference"
     bl_options = {"REGISTER", "UNDO"}
     reference: bpy.props.IntProperty()
     obj: bpy.props.StringProperty()
 
-    def execute(self, context):
-        return IfcStore.execute_ifc_operator(self, context)
-
     def _execute(self, context):
         obj = bpy.data.objects.get(self.obj) if self.obj else context.active_object
         self.file = IfcStore.get_file()
 
-        classification = None
-
         props = context.scene.BIMClassificationProperties
-        classification_name = Data.library_classifications[int(props.available_classifications)]
+        classification = None
-        for classification_id, classification in Data.classifications.items():
+        classification_name = IfcStore.classification_file.by_id(int(props.available_classifications)).Name
-            if classification["Name"] == classification_name:
+        for element in tool.Ifc.get().by_type("IfcClassification"):
-                classification = self.file.by_id(classification_id)
+            if element.Name == classification_name:
+                classification = element
                 break
 
         ifcopenshell.api.run(
             "classification.add_reference",
             self.file,
-            **{
+            reference=IfcStore.classification_file.by_id(self.reference),
-                "reference": Data.library_file.by_id(self.reference),
+            product=tool.Ifc.get_entity(obj),
-                "product": self.file.by_id(obj.BIMObjectProperties.ifc_definition_id),
+            classification=classification,
-                "classification": classification,
-            },
         )
-        Data.load(IfcStore.get_file(), obj.BIMObjectProperties.ifc_definition_id)
-        Data.load(IfcStore.get_file())
-        return {"FINISHED"}
 
 
 class ChangeClassificationLevel(bpy.types.Operator):
@@ -279,5 +234,27 @@ class ChangeClassificationLevel(bpy.types.Operator):
     parent_id: bpy.props.IntProperty()
 
     def execute(self, context):
-        getReferences(self, context, parent_id=self.parent_id)
+        props = context.scene.BIMClassificationProperties
+        props.available_library_references.clear()
+        for reference in IfcStore.classification_file.by_id(self.parent_id).HasReferences:
+            new = props.available_library_references.add()
+            new.identification = reference.Identification or ""
+            new.name = reference.Name or ""
+            new.ifc_definition_id = reference.id()
+            new.has_references = bool(reference.HasReferences)
+            new.referenced_source
+        if reference.ReferencedSource.is_a("IfcClassificationReference"):
+            props.active_library_referenced_source = reference.ReferencedSource.ReferencedSource.id()
+        else:
+            props.active_library_referenced_source = 0
         return {"FINISHED"}
+
+
+class DisableEditingClassificationReferences(bpy.types.Operator):
+    bl_idname = "bim.disable_editing_classification_references"
+    bl_label = "Disable Editing Classification References"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        props = context.scene.BIMClassificationProperties
+        props.available_library_references.clear()

src/blenderbim/blenderbim/bim/module/classification/prop.py

@@ -17,8 +17,9 @@
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
 import bpy
+from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.prop import StrProperty, Attribute
-from ifcopenshell.api.classification.data import Data
+from blenderbim.bim.module.classification.data import ClassificationsData
 from bpy.types import PropertyGroup
 from bpy.props import (
     PointerProperty,
@@ -31,42 +32,10 @@ from bpy.props import (
     CollectionProperty,
 )
 
-classification_enum = []
+def get_available_classifications(self, context):
-
+    if not ClassificationsData.is_loaded:
-
+        ClassificationsData.load()
-def purge():
+    return ClassificationsData.data["available_classifications"]
-    global classification_enum
-    classification_enum = []
-
-
-def getClassifications(self, context):
-    global classification_enum
-    if len(classification_enum) < 1:
-        classification_enum.clear()
-        classification_enum.extend([(str(i), n, "") for i, n in Data.library_classifications.items()])
-        if classification_enum:
-            getReferences(self, context, parent_id=int(classification_enum[0][0]))
-    return classification_enum
-
-
-def updateClassification(self, context):
-    getReferences(self, context, parent_id=int(self.available_classifications))
-
-
-def getReferences(self, context, parent_id=None):
-    props = context.scene.BIMClassificationProperties
-    props.available_library_references.clear()
-    for reference in Data.library_file.by_id(parent_id).HasReferences:
-        new = props.available_library_references.add()
-        new.identification = reference.Identification or ""
-        new.name = reference.Name or ""
-        new.ifc_definition_id = reference.id()
-        new.has_references = bool(reference.HasReferences)
-        new.referenced_source
-    if reference.ReferencedSource.is_a("IfcClassificationReference"):
-        props.active_library_referenced_source = reference.ReferencedSource.ReferencedSource.id()
-    else:
-        props.active_library_referenced_source = 0
 
 
 class ClassificationReference(PropertyGroup):
@@ -78,9 +47,7 @@ class ClassificationReference(PropertyGroup):
 
 
 class BIMClassificationProperties(PropertyGroup):
-    available_classifications: EnumProperty(
+    available_classifications: EnumProperty(items=get_available_classifications, name="Available Classifications")
-        items=getClassifications, name="Available Classifications", update=updateClassification
-    )
     classification_attributes: CollectionProperty(name="Classification Attributes", type=Attribute)
     active_classification_id: IntProperty(name="Active Classification Id")
     available_library_references: CollectionProperty(name="Available Library References", type=ClassificationReference)

src/blenderbim/blenderbim/bim/module/classification/ui.py

@@ -16,10 +16,12 @@
 # You should have received a copy of the GNU General Public License
 # along with BlenderBIM Add-on.  If not, see <http://www.gnu.org/licenses/>.
 
+import blenderbim.bim.helper
+import blenderbim.tool as tool
 import blenderbim.bim.module.classification.prop as classification_prop
 from bpy.types import Panel, UIList
 from blenderbim.bim.ifc import IfcStore
-from ifcopenshell.api.classification.data import Data
+from blenderbim.bim.module.classification.data import ClassificationsData, ClassificationReferencesData
 
 
 class BIM_PT_classifications(Panel):
@@ -33,15 +35,15 @@ class BIM_PT_classifications(Panel):
 
     @classmethod
     def poll(cls, context):
-        return IfcStore.get_file()
+        return tool.Ifc.get()
 
     def draw(self, context):
-        if not Data.is_loaded:
+        if not ClassificationsData.is_loaded:
-            Data.load(IfcStore.get_file())
+            ClassificationsData.load()
 
         self.props = context.scene.BIMClassificationProperties
 
-        if Data.library_file:
+        if ClassificationsData.data["has_classification_file"]:
             row = self.layout.row(align=True)
             row.prop(self.props, "available_classifications", text="")
             row.operator("bim.load_classification_library", text="", icon="IMPORT")
@@ -51,33 +53,25 @@ class BIM_PT_classifications(Panel):
             row.label(text="No Active Classification Library")
             row.operator("bim.load_classification_library", text="", icon="IMPORT")
 
-        for classification_id, classification in Data.classifications.items():
+        for classification in ClassificationsData.data["classifications"]:
-            if self.props.active_classification_id == classification_id:
+            if self.props.active_classification_id == classification["id"]:
-                self.draw_editable_ui(classification)
+                self.draw_editable_ui()
             else:
-                self.draw_ui(classification_id, classification)
+                self.draw_ui(classification)
 
-    def draw_editable_ui(self, classification):
+    def draw_editable_ui(self):
         row = self.layout.row(align=True)
-        row.prop(self.props.classification_attributes.get("Name"), "string_value", text="", icon="ASSET_MANAGER")
+        row.operator("bim.edit_classification", text="Save changes", icon="CHECKMARK")
-        row.operator("bim.edit_classification", text="", icon="CHECKMARK")
         row.operator("bim.disable_editing_classification", text="", icon="CANCEL")
+        blenderbim.bim.helper.draw_attributes(self.props.classification_attributes, self.layout)
 
-        for attribute in self.props.classification_attributes:
+    def draw_ui(self, classification):
-            if attribute.name == "Name":
-                continue
-            row = self.layout.row(align=True)
-            row.prop(attribute, "string_value", text=attribute.name)
-            if attribute.is_optional:
-                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
-
-    def draw_ui(self, classification_id, classification):
         row = self.layout.row(align=True)
         row.label(text=classification["Name"], icon="ASSET_MANAGER")
         if not self.props.active_classification_id:
             op = row.operator("bim.enable_editing_classification", text="", icon="GREASEPENCIL")
-            op.classification = classification_id
+            op.classification = classification["id"]
-        row.operator("bim.remove_classification", text="", icon="X").classification = classification_id
+        row.operator("bim.remove_classification", text="", icon="X").classification = classification["id"]
 
 
 class BIM_PT_classification_references(Panel):
@@ -93,74 +87,63 @@ class BIM_PT_classification_references(Panel):
     def poll(cls, context):
         if not context.active_object:
             return False
-        if not IfcStore.get_element(context.active_object.BIMObjectProperties.ifc_definition_id):
+        return bool(tool.Ifc.get_entity(context.active_object))
-            return False
-        return bool(context.active_object.BIMObjectProperties.ifc_definition_id)
 
     def draw(self, context):
+        if not ClassificationReferencesData.is_loaded:
+            ClassificationReferencesData.load()
+
         obj = context.active_object
         self.oprops = obj.BIMObjectProperties
         self.sprops = context.scene.BIMClassificationProperties
         self.props = obj.BIMClassificationReferenceProperties
         self.file = IfcStore.get_file()
-        if not Data.is_loaded:
-            Data.load(IfcStore.get_file())
-        if self.oprops.ifc_definition_id not in Data.products:
-            Data.load(IfcStore.get_file(), self.oprops.ifc_definition_id)
 
         self.draw_add_ui(context)
 
-        reference_ids = Data.products[self.oprops.ifc_definition_id]
+        if not ClassificationReferencesData.data["references"]:
-        if not reference_ids:
             row = self.layout.row(align=True)
             row.label(text="No References")
 
-        for reference_id in reference_ids:
+        for reference in ClassificationReferencesData.data["references"]:
-            reference = Data.references[reference_id]
+            if self.props.active_reference_id == reference["id"]:
-            if self.props.active_reference_id == reference_id:
+                self.draw_editable_ui()
-                self.draw_editable_ui(reference)
             else:
-                self.draw_ui(reference_id, reference)
+                self.draw_ui(reference)
 
     def draw_add_ui(self, context):
-        if not classification_prop.getClassifications(self.sprops, context):
+        if not ClassificationReferencesData.data["is_available_classification_added"]:
             return
-
-        name = Data.library_classifications[int(self.sprops.available_classifications)]
-        if name in [c["Name"] for c in Data.classifications.values()]:
-            row = self.layout.row(align=True)
-            row.prop(self.sprops, "available_classifications", text="")
-            if self.sprops.active_library_referenced_source:
-                op = row.operator("bim.change_classification_level", text="", icon="FRAME_PREV")
-                op.parent_id = self.sprops.active_library_referenced_source
-            op = row.operator("bim.add_classification_reference", text="", icon="ADD")
-            op.reference = self.sprops.available_library_references[
-                self.sprops.active_library_reference_index
-            ].ifc_definition_id
-            self.layout.template_list(
-                "BIM_UL_classifications",
-                "",
-                self.sprops,
-                "available_library_references",
-                self.sprops,
-                "active_library_reference_index",
-            )
-
-    def draw_editable_ui(self, reference):
         row = self.layout.row(align=True)
-        row.prop(self.props.reference_attributes.get("Name"), "string_value", text="", icon="ASSET_MANAGER")
+        row.prop(self.sprops, "available_classifications", text="")
-        row.operator("bim.edit_classification_reference", text="", icon="CHECKMARK")
+        if not self.sprops.available_library_references:
+            op = row.operator("bim.change_classification_level", text="", icon="IMPORT")
+            op.parent_id = int(self.sprops.available_classifications)
+            return
+        if self.sprops.active_library_referenced_source:
+            op = row.operator("bim.change_classification_level", text="", icon="FRAME_PREV")
+            op.parent_id = self.sprops.active_library_referenced_source
+        op = row.operator("bim.add_classification_reference", text="", icon="ADD")
+        op.reference = self.sprops.available_library_references[
+            self.sprops.active_library_reference_index
+        ].ifc_definition_id
+        row.operator("bim.disable_editing_classification_references", text="", icon="CANCEL")
+        self.layout.template_list(
+            "BIM_UL_classifications",
+            "",
+            self.sprops,
+            "available_library_references",
+            self.sprops,
+            "active_library_reference_index",
+        )
+
+    def draw_editable_ui(self):
+        row = self.layout.row(align=True)
+        row.operator("bim.edit_classification_reference", text="Save changes", icon="CHECKMARK")
         row.operator("bim.disable_editing_classification_reference", text="", icon="CANCEL")
+        blenderbim.bim.helper.draw_attributes(self.props.reference_attributes, self.layout)
 
-        for attribute in self.props.reference_attributes:
+    def draw_ui(self, reference):
-            if attribute.name == "Name":
-                continue
-            row = self.layout.row(align=True)
-            row.prop(attribute, "string_value", text=attribute.name)
-            if attribute.is_optional:
-                row.prop(attribute, "is_null", icon="RADIOBUT_OFF" if attribute.is_null else "RADIOBUT_ON", text="")
-
-    def draw_ui(self, reference_id, reference):
         row = self.layout.row(align=True)
         if self.file.schema == "IFC2X3":
             name = reference["ItemReference"] or "No Identification"
@@ -170,8 +153,8 @@ class BIM_PT_classification_references(Panel):
         row.label(text=reference["Name"] or "")
         if not self.props.active_reference_id:
             op = row.operator("bim.enable_editing_classification_reference", text="", icon="GREASEPENCIL")
-            op.reference = reference_id
+            op.reference = reference["id"]
-        row.operator("bim.remove_classification_reference", text="", icon="X").reference = reference_id
+        row.operator("bim.remove_classification_reference", text="", icon="X").reference = reference["id"]
 
 
 class BIM_UL_classifications(UIList):

src/blenderbim/blenderbim/bim/module/pset_template/ui.py

@@ -18,7 +18,6 @@
 
 import bpy
 from bpy.types import Panel
-from blenderbim.bim.ifc import IfcStore
 from blenderbim.bim.helper import prop_with_search
 from blenderbim.bim.module.pset_template.data import PsetTemplatesData
 

src/ifcopenshell-python/ifcopenshell/api/classification/data.py

@@ -66,7 +66,7 @@ class Data:
         for classification in cls._file.by_type("IfcClassification"):
             data = classification.get_info()
             if cls._file.schema == "IFC2X3" and data["EditionDate"]:
-                data["EditionDate"] = ifcopenshell.util.date(data.EditionDate).isoformat()
+                data["EditionDate"] = ifcopenshell.util.date.ifc2datetime(data["EditionDate"]).isoformat()
             cls.classifications[classification.id()] = data
 
     @classmethod