Part 6: 5.2.5 Arrays
clearly says that a structure field of type matrix has 2 or more dimensions,
and allows single array dimensions to be 0, or -1.

But on the other hand,
Part 6: 5.2.2.16 Variant

does not say anything if the ArrayDimensions Length may be 1 or not,
but instead requires each dimension to be greater than zero.

Moreover, currently the implementation in the .NET standard stack does
look like it would let 1-dimensional Matrix values pass thru, whether or
not they are used in Variant or in Structure field encoding context.
See: private Variant ReadVariantValue(string fieldName) for the Variant value decoding,
and: public Array ReadArray() for the Structure value decoding.
In case of valueRank >= ValueRanks.TwoDimensions the resulting number of
matrix dimensions is not checked to be 2 or more.

We would like to know how exactly we should treat such 1-dimensional
matrix values, if they happen to occur in the binary encoding.