Managing mode based on many edition of drawingdatabase is expounded it recorded expressly the course of edition and backdate correctly for many edition.
阐述了多版本图档管理模式，该模式能清楚记载版本演变历程，准确实现多版本的回溯；
2
This article describes the idea for designing, the technology for developing and the application in engineering practice of engineering Parameterization DrawingDatabase application.
介绍了工程参数化图形数据库应用软件的设计思想，开发技术以及在工程实践中的应用。
3
This suite of open source productivity tools includes a word-processing program, a spreadsheet creator, a presentation tool, drawing software and database program.