Describe common lexical or text processing processes designed to improve the accuracy of the system.
Documents are information objects.
We usually focus on text documents, but we are really interested in multimedia documents that can contain text, images, video, and sound. For example, a CNN broadcast with closed-caption text could be a document. Document representation is a process of determining how the document contents will be known to the system. It corresponds to the document parsing component of an IR system. Stemming conflates different word forms that have the same meaning.