理学 元模型体系结构 释 object constraint language; OCL 对象约束语言 一种形式化的模型描述语言。用于描述统一建模语言（UML）模型的细节，既是UML规范的组成部分，也可视为一种独立的语言。
软件工程 释文 object constraint language, OCL 对象约束语言
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- unit normal vector
- unit of a field
- unit of a group
- unit of a lattice
- unit of an adjunction
- unit of an adjunction of functors
- unit of an algebra
- unit of angle
- unit of area
- unit of a ring
- unit of a symmetric matrix
- unit of a vector lattice
- unit of evolution
- unit of exposure
- unit of fire safety management system
- unit of fit
- unit of geological mapping
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- unit operation
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