Hello,

I am using DSpace 7.5.
I would like to know from your experience, what is the best approach to use
metadata that don't fit exactly on DC schema.

Let's say I want to use the following four metadata to describe an
artifact.
1. Height (number)
2. Width (number)
3. Depth (number)
4. Arrangement [ horizontal, vertical]

Those four according to DC Schema should be put in the element
Format.Extent but this is one field and the user should have to submit
something like "3x4x5xvertical" .

I don't find this to beuser friendly.
I want to have 4 different fields.
As far as I can see I have 3 alternatives. (Please let me know I there are
other options).

1. Extend Dublin core metadata with four extra elements like that:
a. Format. Extent.Height
b. Format. Extent.Width
c. Format. Extent.Depth
d. Format. Extent.Arrangement.

2. Add one more schema let's say schema.org.Product and use it's elements
in combination with a custom element like that:
1. Product. Height
2. Product. Width
3. Product. Depth
4. Local. Arrangement (This is a total custom element. I could not find a
schema that has such an element)

3. Use RDF to describe my metadata by linking them to a schema  let's say
schema.org.product


So which one consider to be the best approach?


On the 3rd option, do I also have to add my metadata to the DSpace metadata
registry or is it enough to declare them as linked data only?

Thanks in advance.

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