Query on Fetching Material, Mass, and Volume Data Using AEC Data Model API

I am currently working on a project where I upload a Revit model to ACC and fetch properties using the AEC Data Model API. My primary goal is to retrieve elements along with their associated material and mass.

Regarding material:

• I am able to retrieve material details for certain categories, such as Walls.
• However, for some categories like Roofs, material details are not returned.
• In the Revit UI, if I edit the roof type, under the Construction section → Edit Structure, I can see the Function and its Material. Is it possible to access this information via the AEC Data Model API?

Regarding mass:

• The API does not return mass values directly; it only provides volume.
• We are considering calculating mass using mass = volume × density, with density being fetched from the Autodesk material library via iteration and mapping.
• For some categories, such as Doors, the volume itself is not returned. Is there any way to fetch the volume of doors using the AEC Data Model API?

Below is the query I am currently using. Please let me know if it can be modified to retrieve the above details.

query GetWallsAndMaterialsAndFinishes($elementGroupId: ID!, $elementsfilter: String!) {
  walls: elementsByElementGroup(
    elementGroupId: $elementGroupId
    filter: { query: $elementsfilter }
    pagination: { limit: 500 }
  ) {
    results {
      id
      name
      alternativeIdentifiers{
        revitElementId
        externalElementId
      }
      properties (filter: { names: ["Volume"] }){
        results {
          name
          value
        }
      }
      # Type reference for the wall
      references(filter: { names: ["Type"] }) {
        results {
          value {
            references(filter: { names: [
              "Structural Material",
              "Finish Material",
              "Material",
              "Interior Finish",
              "Exterior Finish",
              "Material Door",
              "Material Frame",
              "Material Ironmongery"
            ]}) {
              results {
                value {
                  name
                }
              }
            }
          }
        }
      }
    }
  }
}

Variable:

{
  "elementGroupId": {modelElemnetGroupId},
  "elementsfilter": "(property.name.category=='Walls' or property.name.category=='Doors' or property.name.category=='Roofs') and 'property.name.Element Context'==Instance"
}

Any help is appreciated !

I got the confirmation from our AEC DM team. The compound structure for walls, roofs are not yet supported in AECDM because It is not a typical parameter.

But we are interested to hear more from you, my colleague should contact you directly for details. Thanks.