What is the difference between IR and data retrieval?

What is information retrieval and also define IR model?

Definition. A model of information retrieval (IR) selects and ranks the relevant documents with respect to a user's query.

What's the difference between information retrieval IR and information extraction IE )?

Information extraction (IE) is the task of automatically extracting structured information from unstructured and/or semi-structured machine-readable documents, while information retrieval (IR) is finding material (usually documents) of an unstructured nature (usually text) that satisfies an information need from within ...

What is data retrieval?

Data retrieval means obtaining data from a Database Management System (DBMS) such as ODBMS. In this case, it is considered that data is represented in a structured way, and there is no ambiguity in data. In order to retrieve the desired data the user present a set of criteria by a query.

What are the two types of information retrieval?

Precision and recall are the two parameters of retrieval effectiveness. Precision refers to how many of the retrieved documents are relevant to the user, whereas recall refers to what fraction of relevant documents in the collection are retrieved.