[Task] Asset Administration Shell - describe semantics of Blob submodel element

[BirgitBoss]

Is your task related to a problem? Please describe. BAMM shall support the semantic definition of Blob submodel elements in the Asset Administration Shell (AAS).

Describe the solution you'd like. introduce predefined entity for Blobs similar to "File Resource" but instead of attribute resource it has an attribute value with data type for very long strings.

Describe alternatives you've considered none

Additional context see also https://github.com/OpenManufacturingPlatform/sds-bamm-aspect-meta-model/issues/138 (reference element) https://industrialdigitaltwin.org/wp-content/uploads/2021/09/07_details_of_the_asset_administration_shell_part1_v3_en_2020.pdf

[atextor]

Here is a proposal for the definition:

bamm-c:Blob a bamm:Characteristic ;
  bamm:dataType xsd:base64Binary .

bamm-e:blobValue a bamm:Property ;
   bamm:characteristic bamm-c:Blob .

bamm-e:BlobResource a bamm:Entity ;
  bamm:properties (
    bamm-e:mimeType
    [ bamm:property bamm-e:blobValue; bamm:payloadName "value" ]
  ) .

And the usage:

:library a bamm:Property ;
   bamm:characteristic [
      a bamm-c:SingleEntity ;
      bamm:dataType bamm-e:BlobResource ;
   ] .

The payload would look like this:

{
    "library": {
        "mimeType": "application/octet-stream",
        "value": "VGhpcyBpcyBteSBibG9i"
    }
}

[BirgitBoss]

2022-06-30 SDS Meeting: approved