MVD exception

[kavehAlahdin]

With a MVD containing IfcBuilding with concept template 'revision control' , I am getting this exception:

Error:
         'NoneType' object has no attribute 'Purpose'
end
<class 'NoneType'>
<class 'NoneType'>

[aothms]

Thanks for reporting. Can you share the mvdXML file? There are quite a bit of versions of the schema floating around. Would help us investigate.

[kavehAlahdin]

Thanks for the reply! I saved it in ifcdoc in mvdxml version 1.1(the official version) Using different Ifc files I get similar exceptions for different attributes. IfcBuilding.txt

[kavehAlahdin]

This file is actually a mvdxml file. I changed it to txt, so I can upload it.

[johltn]

With the recent commits you can get the expected results using the snippet below on the model here in IFC4 at http://openifcmodel.cs.auckland.ac.nz/Model/Details/307 :

import ifcopenshell
from ifcopenshell.mvd import mvd

concept_roots = list(ifcopenshell.mvd.concept_root.parse(r"examples/building.mvdxml"))
file = ifcopenshell.open(r"models\20160125Autodesk_Hospital_Parking Garage_2015 - IFC4.ifc")

for concept_root in concept_roots:
    print("ConceptRoot: ", concept_root.entity)
    example_entity = file.by_type(concept_root.entity)[0]

    concepts = sorted(concept_root.concepts(), key=mvd.is_applicability, reverse=True)
    for concept in concepts:
        print("Concept Name: ", concept.name)
        # print(concept.template().rules)

        if len(concept.template().rules) > 1:
            attribute_rules = []
            for rule in concept.template().rules:
                attribute_rules.append(rule)
            rules_root = ifcopenshell.mvd.rule("EntityRule", concept_root.entity, attribute_rules)
        else:
            rules_root = concept.template().rules[0]

        data = mvd.extract_data(rules_root, example_entity)
        print("Result from traversal:")
        for d in data:
            for k,v in d.items():
                print(k,v)
            print()

    print("\n")

Output:

ConceptRoot:  IfcBuilding
Concept Name:  Spatial Decomposition
Result from traversal:
<Rule EntityRule IfcLabel> Potential Ground Water Elevation

<Rule EntityRule IfcLabel> Ground Floor

<Rule EntityRule IfcLabel> Exist Garage - Ground Level

<Rule EntityRule IfcLabel> 1st Floor

<Rule EntityRule IfcLabel> Existing Garage - 1st Level

<Rule EntityRule IfcLabel> Existing Garage - 2nd Level

<Rule EntityRule IfcLabel> 2nd Floor

<Rule EntityRule IfcLabel> Existing Garage - 3rd Level

<Rule EntityRule IfcLabel> Existing Garage - 4th Level

<Rule EntityRule IfcLabel> Existing Garage - 5th Level

<Rule EntityRule IfcLabel> Existing Garage - Roof Level

<Rule EntityRule IfcLabel> Exhaust Structure Roof

Concept Name:  Spatial Composition
Result from traversal:
<Rule EntityRule IfcLabel> Default

Concept Name:  Classification Association
Result from traversal:
<Rule AttributeRule HasAssociations> empty data structure

Concept Name:  Object Typing
Result from traversal:
<Rule AttributeRule IsTypedBy> empty data structure

Concept Name:  Property Sets for Objects
Result from traversal:
<Rule AttributeRule PredefinedType> Invalid Attribute
<Rule EntityRule IfcLabel> Pset_BuildingCommon
<Rule EntityRule IfcIdentifier> Reference
<Rule AttributeRule Description> Nonexistent value
<Rule EntityRule IfcValue> IfcIdentifier('Project Information')
<Rule AttributeRule Purpose> Invalid attribute rule

<Rule AttributeRule PredefinedType> Invalid Attribute
<Rule EntityRule IfcLabel> Pset_BuildingCommon
<Rule EntityRule IfcIdentifier> NumberOfStoreys
<Rule AttributeRule Description> Nonexistent value
<Rule EntityRule IfcValue> IfcInteger(12)
<Rule AttributeRule Purpose> Invalid attribute rule

Concept Name:  Quantity Sets
Result from traversal:
Concept Name:  Product Local Placement
Result from traversal:
<Rule EntityRule IfcAxis2Placement3D> #32=IfcAxis2Placement3D(#6,$,$)
<Rule EntityRule IfcLocalPlacement> #196109=IfcLocalPlacement($,#196108)

Concept Name:  Box Geometry
Result from traversal:
<Rule AttributeRule Representation> Nonexistent value

Concept Name:  Spatial Container
Result from traversal:
<Rule AttributeRule ContainsElements> empty data structure

Concept Name:  Building Attributes
Result from traversal:
<Rule EntityRule IfcLabel> 
<Rule EntityRule IfcLabel> 
<Rule EntityRule IfcElementCompositionEnum> ELEMENT
<Rule AttributeRule ElevationOfRefHeight> Nonexistent value
<Rule AttributeRule ElevationOfTerrain> Nonexistent value
<Rule AttributeRule Purpose> Nonexistent value
<Rule AttributeRule Description> Nonexistent value
<Rule AttributeRule UserDefinedPurpose> Nonexistent value
<Rule AttributeRule InternalLocation> Nonexistent value
<Rule EntityRule IfcLabel> Enter address here
<Rule AttributeRule PostalBox> Nonexistent value
<Rule EntityRule IfcLabel> 
<Rule EntityRule IfcLabel> Rochester
<Rule EntityRule IfcLabel> 
<Rule EntityRule IfcLabel> NY

Concept Name:  Object Predefined Type
Result from traversal:
<Rule AttributeRule ObjectType> Nonexistent value
<Rule AttributeRule IsTypedBy> empty data structure

Concept Name:  Object User Identity
Result from traversal:
<Rule EntityRule IfcLabel> 
<Rule AttributeRule Description> Nonexistent value
<Rule AttributeRule IsTypedBy> empty data structure

[kavehAlahdin]

Thanks alot Johan. It is working. I can produce the same result as you have. I have a confusion still. How can I use mvd to create the result ifc file? I see the data variable from above being a list of concepts and using extract_dataand there is also the example from readmefile with get_data() method. I am not sure how I can follow up! Thanks Kaveh