Grant Fritchey explains the sys.dm_exec_plan_attributes DMV:
There is a DMV that isn’t used a lot of the time because the information within it frequently doesn’t have a lot of bearing on solving fundamental query tuning issues such as out of date statistics, bad or missing indexes, or poorly structured T-SQL. This DMV, sys.dm_exec_plan_attributes, contains a bunch of values that are used by the optimizer to identify a plan in cache, such as object_id (if any), database_id, and compatibility level (compat_level). In addition to these clear & easy to understand attributes, there’s one more, set_options, that’s not immediately clear.
Read on for more information and a sample call.