Schematron: Add this ISO/IEC standard language for making assertions about patterns in XML documents to your toolbox.
Schematron：将这个用于对XML文档中的模式做出断言的ISO/IEC标准语言添加到您的工具箱。
RELAX NG information site: Find links and information about ISO/IEC 19757-2:2008.
RELAX NG信息站点：找到关于ISO/IEC 19757-2:2008 的链接和信息。
Standard IEC 61131-3 is a standard about programming language for PLC, developed by International Electrotechnical Commission (IEC).
IEC 61131-3标准是国际电工委员会（IEC）公布的关于可编程控制器的编程语言的标准。
Standard IEC 61131-3 is a standard about programming language for PLC, developed by International Electrotechnical Commission (IEC).
IEC 61131-3标准是国际电工委员会（IEC）公布的关于可编程控制器的编程语言的标准。
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