Possible Issues to Handle

• 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