263441005: structuur van caput van middenfalanx van digitus II van hand (lichaamsstructuur)

SNOMED CT Concept\Body structure\Anatomical or acquired body structure (body structure)\Anatomical structure\...

\Body organ structure\Structure of bone organ\Bone structure\...

\Structure of type of bone (body structure)\Structure of long bone\...

\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\...

\Bone structure of phalanx of finger\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of phalanx of finger\Structure of phalanx of middle finger\Head of middle phalanx of finger\Head of middle phalanx of index finger

\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger

\Phalanx structure\Structure of middle phalanx (body structure)\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Structure of middle phalanx (body structure)\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Epiphysis of phalanx\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of middle finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger

\Regional bone structure\Bone structure of extremity\...

\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Epiphysis of wrist and/or hand\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of interphalangeal joint of hand region (body structure)\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of middle finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Bone structure of free upper limb\Bone structure of wrist and/or hand (body structure)\Bone structure of hand\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of middle finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Structure of long bone of upper limb (body structure)\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Part of bone of upper limb (body structure)\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Part of bone of upper limb (body structure)\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Part of bone of upper limb (body structure)\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone structure of upper limb (body structure)\Epiphysis of upper limb\Epiphysis of wrist and/or hand\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger

\Phalanx structure\Structure of middle phalanx (body structure)\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Structure of middle phalanx (body structure)\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Epiphysis of phalanx\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Phalanx part\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Bone structure of middle phalanx of finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of index finger\Structure of middle phalanx of index finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Bone structure of phalanx of finger\Structure of phalanx of middle finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Phalanx structure\Bone structure of phalanx of hand\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger

\Bone part\Part of bone of upper limb (body structure)\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Part of bone of upper limb (body structure)\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Part of bone of upper limb (body structure)\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone part\Structure of region of bone (body structure)\Structure of epiphysis\Epiphysis of limb\Epiphysis of upper limb\Epiphysis of wrist and/or hand\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Structure of region of bone (body structure)\Structure of epiphysis\Epiphysis of limb\Epiphysis of phalanx\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Structure of region of bone (body structure)\Structure of epiphysis\Epiphysis of limb\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Structure of region of bone (body structure)\Structure of epiphysis\Epiphysis of limb\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone part\Phalanx part\Epiphysis of phalanx\Epiphysis of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Phalanx part\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Phalanx part\Epiphysis of phalanx\Head of phalanx\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger
\Bone part\Phalanx part\Part of phalanx of hand\Epiphysis of phalanx of finger\Epiphysis of middle phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Phalanx part\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Head of middle phalanx of finger\Head of middle phalanx of index finger
\Bone part\Phalanx part\Part of phalanx of hand\Structure of head of phalanx of hand\Head of phalanx of finger\Structure of head of phalanx of index finger\Head of middle phalanx of index finger

\Body system structure\Structure of musculoskeletal system (body structure)\...

Structure of middle phalanx of index finger

Head of middle phalanx of index finger

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module

391675017 Head of middle phalanx of index finger en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

4627622014 Structure of head of middle phalanx of index finger en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

4627623016 Structure of head of middle phalanx of index finger (body structure) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

5936191000146111 structuur van caput van middenfalanx van digitus II van hand nl Synonym (core metadata concept) Active Only initial character case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

5936201000146113 caput van phalanx media van digitus secundus manus nl Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

5936211000146110 caput van middenfalanx van digitus manus II nl Synonym (core metadata concept) Active Only initial character case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

5936221000146117 caput van middenfalanx van digitus II van hand nl Synonym (core metadata concept) Active Only initial character case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

5936231000146115 structuur van caput van middenfalanx van digitus II van hand (lichaamsstructuur) nl Fully specified name Active Only initial character case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

5936251000146114 kop van middenkootje van wijsvinger nl Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

5940311000146117 caput van middenfalanx van index nl Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

6171291000146111 kop van middelste falanx van wijsvinger nl Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

6258981000146113 caput van midfalanx van digitus II van hand nl Synonym (core metadata concept) Active Only initial character case insensitive (core metadata concept) SNOMED CT Netherlands NRC maintained module (core metadata concept)

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Head of middle phalanx of index finger	Is a	Head of middle phalanx of finger	true	Inferred relationship	Some
Head of middle phalanx of index finger	Is a	Structure of head of phalanx of index finger	true	Inferred relationship	Some
Head of middle phalanx of index finger	Part of	Entire phalanx of index finger	false	Additional relationship	Some
Head of middle phalanx of index finger	Part of	gehele falanx van hand	false	Additional relationship	Some
Head of middle phalanx of index finger	Is a	Structure of middle phalanx of index finger	true	Inferred relationship	Some
Head of middle phalanx of index finger	Laterality	Side	true	Inferred relationship	Some

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
Entire head of middle phalanx of index finger (body structure)	Is a	True	Head of middle phalanx of index finger	Inferred relationship	Some

Reference Sets

Lateralizable body structure reference set (foundation metadata concept)

Anatomy structure and entire association reference set (foundation metadata concept)