How to see all attributes of a particular namespace in a context

Question

I can see the value of a attribute for a partiuclar namespace using following query
select sys_context ('USERENV','TERMINAL') FROM DUAL;
select sys_context ('USERENV','DB_NAME') FROM DUAL;
but, how to find out all attributes for a given namesapce like here 'USERENV' or any user defined namespace. Is there any query or dba view which will list all attributes for a given namespace
Thanks for your help

Answer 1

This is table called DICT, where you can find many other things.
SS
SQL> select * from dict where table_name like '%CONTEX%'
  2  /
TABLE_NAME
COMMENTS
ALL_CONTEXT
Description of all active context namespaces under the current session
USER_EVALUATION_CONTEXTS
rule evaluation contexts owned by user
ALL_EVALUATION_CONTEXTS
rule evaluation contexts seen by user
USER_EVALUATION_CONTEXT_TABLES
tables in user rule evaluation contexts
ALL_EVALUATION_CONTEXT_TABLES
tables in all rule evaluation contexts seen by the user
USER_EVALUATION_CONTEXT_VARS
variables in user rule evaluation contexts
ALL_EVALUATION_CONTEXT_VARS
variables in all rule evaluation contexts seen by the user
ALL_POLICY_CONTEXTS
All policy driving context defined for all synonyms, tables, or views accessable to the user
USER_POLICY_CONTEXTS
All policy driving context defined for synonyms, tables, or views in current schema
9 rows selected.