NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension (product) 0..*ElementProduct
... extension (name)
.... valueCoding 1..1CodingContract.product.name Coding
... extension (desc)
.... valueString 1..1stringContract.product.desc String
... extension (guid)
.... valueString 1..1stringContract.product.guid String
... id 0..1idxml:id (or equivalent in JSON)
... extension 0..*ExtensionAdditional Content defined by implementations
... value[x] 0..0*

doco Documentation for this format