本文件为编目方法提供了一个有用的框架。看来 现有功能目录与框架完全兼容，即使某些 通用特征模型中提供的概念仅出现在现有标准中 非结构化自然语言定义。在标识中可能会发现差异 在特征和属性域中，分类方法的多样性 选择标准，以及特征的几何表示的程度， 通过空间原语，被视为特征目录的一个组成部分。

This document provides a useful framework for cataloguing methodology. It appears that existing feature catalogues are fully compatible with the framework, even if certain of the concepts provided in the General Feature Model occur in existing standards only within unstructured natural language definitions. Differences may be found in the identification of feature and attribute domains, the variety of approaches to classification, inclusion of selection criteria, and in the extent to which the geometric representation of features, through spatial primitives, is considered an integral part of a feature catalogue.