76986006: Structure of distal phalanx of second toe (body structure)

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 lower limb (body structure)\Bone structure of phalanx of foot\...

\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe

\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe

\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe

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

\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone structure of lower limb\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe
\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe

\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe

\Bone part\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe

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

\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone and/or joint structure of limb (body structure)\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Bone and/or joint structure (body structure)\Bone structure\Bone part\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe

\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Structure of type of bone (body structure)\Structure of long bone\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Structure of distal phalanx (body structure)\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Regional bone structure\Bone structure of extremity\Phalanx structure\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of bony skeleton\Bony skeleton subdivision\Bone structure\Bone part\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Bone structure of free lower limb (body structure)\Structure of long bone of lower limb (body structure)\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Part of bone of lower limb (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of phalanx of lesser toe\Structure of phalanx of second toe\Structure of distal phalanx of second toe
\Skeletal system structure\Structure of appendicular skeleton (body structure)\Bone structure of lower limb\Bone structure of ankle and/or foot (body structure)\Bone structure of foot\Bone structure of forefoot\Bone structure of phalanx of foot\Structure of distal phalanx of foot (body structure)\Structure of distal phalanx of lesser toe (body structure)\Structure of distal phalanx of second toe

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

127805019 Distal phalanx of second toe en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

503426012 Structure of distal phalanx of second toe en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

817766017 Structure of distal phalanx of second toe (body structure) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

4047581000052115 distal falang i andra tån, struktur sv Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Sweden NRC maintained module (core metadata concept)

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Structure of distal phalanx of second toe	Is a	Structure of distal phalanx of foot	false	Inferred relationship	Some
Structure of distal phalanx of second toe	Is a	Structure of phalanx of second toe	true	Inferred relationship	Some
Structure of distal phalanx of second toe	del av	Entire bony skeleton	false	Additional relationship	Some
Structure of distal phalanx of second toe	del av	Entire foot	false	Additional relationship	Some
Structure of distal phalanx of second toe	del av	Entire digit	false	Additional relationship	Some
Structure of distal phalanx of second toe	Is a	Structure of distal phalanx of foot (body structure)	false	Inferred relationship	Some
Structure of distal phalanx of second toe	Is a	Structure of distal phalanx of lesser toe (body structure)	true	Inferred relationship	Some
Structure of distal phalanx of second toe	Is a	Part of bone of lower limb (body structure)	true	Inferred relationship	Some
Structure of distal phalanx of second toe	Laterality	Side	true	Inferred relationship	Some

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
Entire distal phalanx of second toe (body structure)	Is a	True	Structure of distal phalanx of second toe	Inferred relationship	Some
Structure of tuberosity of distal phalanx of second toe (body structure)	Is a	True	Structure of distal phalanx of second toe	Inferred relationship	Some
Bone tissue of distal phalanx of second toe	Is a	True	Structure of distal phalanx of second toe	Inferred relationship	Some

Reference Sets

Lateralizable body structure reference set (foundation metadata concept)

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