Do CA Datacom/DB Version 15.1 solutions (PTFs) apply to version 15.0? Can I apply 15.1 PTFs to bring 15.0 up to maintenance?
No. CA Datacom/DB 15.1 is a separate release than 15.0 with unique SMP/e FMIDs and PTF solutions.
To bring 15.0 up to maintenance, apply only 15.0 solutions.
Note that when a problem is identified in version 15.0 or in version 15.1, CA determines provides a PTF for each version if the problem exists in that version.