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
- Rescue Agreement
- rescue and protection project of Hengdaohezi Garage of Heilongjiang Middle East railway building Complex and Orthodox Church of Notre Dame
- Rescue and Salvage
- rescue and transportation space of railway tunnel
- rescue device for extravehicular activity
- rescue disposal
- rescue environment system
- rescue equipment
- Rescue Gloves
- rescue helicopter
- rescue mission system
- rescue net
- rescue of the wounded in nuclear damage zone
- rescue on the water
- Rescue,Preservation and Research of National Key Archives
- rescue rope
- rescue team system
- rescue train
- rescue work by super drilling
- rescuring damaged archives in Wenchuan earthquake in 2008
- research analyst
- research and application of green control technology for barley and forage pests in Qinghai-Tibet Plateau
- research and development
- Research and development expenditures
- research and development for nuclear power