Attributes

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Attributes consist of:

• ID – identification number
• Name – technical name of the attribute
• Display name – human readable name
• Description – what purpose the attribute have
• Entity – what entity it is used for:
  • Entityless – attribute for the entire Perun system and doesn't apply to a particular entity, e.g. namespace-maxGID
  • Facility
  • Group
  • Group_resource – group linked to a specific resource
  • Group_member – membership in certain group
  • Host
  • Member
  • Member_resource – quotas and limits for using resource
  • Resource
  • User ext_source – primary user identities (LDAP, SQL)
  • User
  • User_facility
  • VO
• Type – type of the attribute (core, def, opt, virt)
• Data type – used data type

Attribute types

• core - basic attributes
• def - extensional attribute with precisely defined purpose
• opt - extensional attribute without strict purpose
• virt - does not have a value on its own, its value is computed from other attributes and relations stored in Perun

Data types

• Map (key-value storage)
• List
• Integer
• String
• LargeString (in case you need to store more than 4kb)
• Boolean

Module options

(only for def, opt, virt)

Modules control correct definition of attributes:

• syntax and semantics (def, opt)
• automatic generation of values (def, opt)
• the dependence of individual attributes on each other (def, opt, virt)
• definition of how the attribute value should be computed (virt)