In the Exchange package there are attributes that reference catalogues and filters by using the VersionedReference <dataytype>. But currently the model does not contain the modelling of catalogues and filters and hence the Schema Tool generates warnings to indicate that these references do not exist.
Until catalogues and filters are specified in the model these references should be changed to be String <datatype>, the agument being that currently, if used, catalogues and filters need to be defined off-line and Strings used to reference them.
This is now fixed and will be released with v2.0 of the model.
Date x2 is defined for the procedural changes for the individuals. All the modes of the date and best writing companies are symbolic for all issues. The change is vital for the approach of the terms for humans. Elevation is filed for the approval of the date x2 for all issues.