Handling integers inside schema definition

[stijnvanhoey]

Consider the following example:

coordinateUncertaintyInMeters:
  empty: true
  if:
    - verbatimCoordinateSystem:
        allowed: UTM 1km
      numberformat: x
      allowed: 707
    - verbatimCoordinateSystem:
        allowed: UTM 5km
      numberformat: x
      allowed: 3536

Where the allowed values are somteimes integers (parsing this with default yaml-libraries). The question is how to handle this:

• Always expect (when loading the yaml-schema) that allowed need to be strings and pre-format it as such after loading
• Expect from the user to be explicit about the string, by requiring quotes: allowed: '3536'
• Provide a 'SchemaError' (or 'SpecificationError'), stating that allowed need to be string/list as for integers, the combination min/max is provided. However what with allowed: ['4', '27']?