noun
relation character
Computing term for a character used to represent a relationship between data elements, such as in databases or formal specifications.
ER図では、エンティティ間の関連を比較文字で表すことがある。
In ER diagrams, relationships between entities are sometimes represented using relation characters.
Compound of 比較 (comparison) and 文字 (character). The exact origin as a computing term is uncertain; it likely arose as a direct translation of the English 'relation character' in technical contexts.