- What are the possible terms?
- “is the set of metadata terms known to the program?”
- Are the properties used correctly?
- “do they make sense for the resources?”
- Can a program reason about some terms? Eg:
- “if «A» is left of «B» and «B» is left of «C», is «A» left of «C»?”
- obviously true for humans, not obvious for a program …
- … programs should be able to deduce such statements
- If somebody else defines a set of terms: are they the same?
- obvious issue in an international context