Determines which of a repository's attributes may be read or edited. Defining security
for a repository consists of granting access permissions to user groups for the records and
attributes the security filters have made available for reading and editing. Attribute
security filters list which attributes are available to be read or edited. If a repository's
security settings do not specify an attribute security filter, the default filter will be
used and no attributes will be visible – no users will be able to see any data in that
repository.