When we study a document, we do it from two points of view:
On the one hand, we look at its external part, that is, at the documentary support. We call this Formal or External Analysis. It helps us to identify a document within a collection. On the other hand, we analyze the content of the document, that is, we study its message, the subject it deals with. This part is known as Content Analysis or Internal. Document Analysis allows us to perform retrospective searches and retrieve the document we need when we need it. Therefore, we can say that Documentary Analysis is linked to Information Retrieval.