There are data format issues on on Custom vector dimensions GetCapabilities response document, described as following:
1. Date format: Dates are displayed on Locale format instead ISO8601 format on default attribute.
2. Interval representation: The end point of the interval representation seems to be the start point (e.g., values 1,2,3,4 -> 1/1 instead of 1/4), also integer numbers are showed as doubles.