Hi there,
it seems that changes in JDK8 have affected standard library behavior
for unpaired surrogate pairs
(<https://en.wikipedia.org/wiki/UTF-16#U.2BD800_to_U.2BDFFF>).
This breaks a BasicDocumentStoreTest case which I added quite some time
ago in order to verify that RDBDocumentStore is compatible with
MongoDocumentStore with respect to this (see
<https://issues.apache.org/jira/browse/OAK-3683>).
With the JDK8 change however, Mongo will trip over unpaired surrogates,
and I wonder whether it would be better just to constrain the string
property model in general -- it would be unfortunate if, for instance,
TarMK could persist something that DocumentMK won't...
Feedback appreciated, Julian
