When first setting up a modeling project, a common request is to populate the catalog with information that may already exist in your organization, rather than having to input it all manually.
第一次设置建模项目时，一个常见要求是使用可能已存在于组织中的信息填充目录，而不是必须手动输入所有信息。
The Semantic web and linked data connect because when we've got this web of linked data, there are already lots of technologies which exist to do fancy things with it.
语义网和关联数据是联系在一起的，因为在我们得到关联数据网的时候，已经有很多技术可以利用关联数据了。
When you call a method on the XML variable, that method doesn't already exist, so it falls into method_missing, which constructs the corresponding XML.
当您在xml变量上调用方法时，该方法尚不存在，因此它属于method_missing，其构建了相应的xml。
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