遥感信息提取是遥感图像处理研究领域中的一项主要内容，也是模式分类范畴研究的课题。
Remote sensing images information extraction is a major content in the remote sensing images research field, and it is also the subject of the study in the pattern classification.
实验室有关范畴学习的研究只局限于对分类的研究上，这就导致在分类研究基础上提出的范畴理论不能适用于其他非分类范畴学习任务。
Laboratory studies of category acquisition limit to categorization task. So category theory on the basis of classification study can not applied to other nonclassification types of category learning.
有些人认为词汇表和分类法也属于元数据的范畴。
Some people consider glossary and taxonomy as metadata as well.
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