However because the basic format is simple and primitive, there is no way to encode semantics without building an extension.
不过因为它的基本标准格式是简单而原始的,想要在其中加入语义编码就必须为其格式建立一些扩展。
In practice, however, the DE facto formats used today on the Internet with parallel Web techniques do not offer much flexibility for extension to new data formats and richer semantics.
不过,在实际情况中,目前在Internet上与并行Web技术一起使用的事实上的格式并没有为新数据格式的扩展提供很多的灵活性,也没有提供更丰富的语义。
Imparting transactional semantics to object-oriented components required an extension of the TPM model, in which transactions are instead defined in terms of invoking methods on transactional objects.
将事务性语义告知面向对象的组件要求对TPM模型进行扩展—在这个模型中事务是按照事务性对象的调用方法定义的。
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