Restricting relationship types to node types and node types with capability types.

[<paul.m.jordan@bt.com>]

At present relationship type definitions may contain a restriction to limit their application to node types which contain one or more of the specified capability types. Currently the name of this keyword is valid_target_types which is somewhat inaccurate and could be confusing.

 

Furthermore I have a pattern for node extension which would benefit from an additional limitation on relationship types so that they were only applicable to specified node types.

 

Therefore I propose that relationship type definition is amended as follows:

 

Keyname	Required	Definition/Type	Description
…
valid_target_types	No	list of string	This keyname is deprecated; valid_target_node_capabilities is now preferred. An optional list of one or more names of Capability Types that must exist within nodes which are valid targets for this relationship. If undefined, target nodes may have any or no Capability Types defined.
valid_target_node_capabilities	no	list of string	An optional list of one or more names of Capability Types that must exist within nodes which are valid targets for this relationship. If undefined, target nodes may have any or no Capability Types defined.
valid_target_node_types	no	list of string	An optional list of one or more names of Node Types that are valid targets for this relationship. If undefined, all Node Types are valid targets.

 

If both valid_target_node_types and valid_target_node_capabilities are specified then they would be ANDed, i.e. the relationship type would be applicable only to a nodes of the specified type if it had one or more of the specified capabilities.

 

Paul Jordan
OSS Specialist
BT Technology | Tel +44 (0) 3316252643  | paul.m.jordan@bt.com

This email contains information from BT that might be privileged or confidential. And it's only meant for the person above. If that's not you, we're sorry - we must have sent it to you by mistake. Please email us to let us know, and don't copy or forward it to anyone else. Thanks.

We monitor our email systems and may record all our emails.
British Telecommunications plc
R/O : 81 Newgate Street, London EC1A 7AJ
Registered in England: No 1800000