Draft editors note

Personalization semantics defines a set of properties and values to
annotate content. The Personalization Task Force is using  the data-* for
attributes for early implementations and prototypes.   Implementers should
be aware that we intend to replace  "data-"  with a reserved prefix when it
is determined.
See our discussion Prototypes with "data-"
<https://github.com/w3c/personalization-semantics/wiki/Prototypes-with-data-dash-*-(Take-2)>
.


All the best

Lisa