UML is a powerful language for object-oriented modeling, but it has some explicit drawbacks. For example, it lacks a model check mechanism so it is difficult to keep the consistence of Meta model.
统一建模语言uml存在着面向对象建模的不足，例如，用多个模型表示系统，模型的一致性难以保证。
XML has emerged as the standard of meta language representing data format. It is rich, clear, extensible and self-description. All advantages make it the best candidate for representing data model.
XML作为一种数据格式描述的元语言标准，它的充足性、条理性、可扩展性和自描述性成为其作为数据模型描述语言的优势。
Main contents are as follows: 1 accepting the idea of General Ontology Language GOL, this paper constructs a CMMS meta-model, and validates it through GOL.
借鉴通用本体的思想，建立了一种任务空间概念模型的元模型，并用通用本体语言(GOL)对该元模型进行检查。
Main contents are as follows: 1 accepting the idea of General Ontology Language GOL, this paper constructs a CMMS meta-model, and validates it through GOL.
借鉴通用本体的思想，建立了一种任务空间概念模型的元模型，并用通用本体语言(GOL)对该元模型进行检查。
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