Class: Expression

A structure for labels representing systematic expressions that describe an entity, as generated by formal nomenclatures (e.g. HGVS for genetic variants, ISCN for karyotypes, HLA nomenclature for HLA genes/alleles).

URI: vaspec:Expression

Parents

• is_a: Element - The base definition for all elements that comprise the model (classes, complex data types, value sets)

Referenced by Class

• Descriptor Descriptor➞valueObjectExpression _0..* Expression

Attributes

Own

• Expression➞value _1..1
  • Description: A free-text rendering of the expression used as a label for the entity
  • Range: String
• Expression➞system _1..1
  • Description: The nomenclature system that created and assigned the expression.
  • Range: String
• Expression➞systemURL _0..1
  • Description: A URL for the nomenclature system
  • Range: Url
• Expression➞systemVersion _0..1
  • Description: The version of the nomenclature system.
  • Range: String

Inherited from Element:

• Element➞extensionElement _0..*
  • Description: A key-value data structure that allows definition of custom fields to capture information not directly supported by the VA specification.
  • Range: Extension

Other properties

Comments:		Similar to the 'Coding' data type, which provides the same fields but for coded values, as opposed to human-readable names.