Page 102 - Touhpad Ai

How Does an Information Retrieval (IR) System Work?
An Information Retrieval system starts working when a user types a search query, explaining what they are looking for.

User

Required Information Documents

Query Indexing

Indexed
Documents

IR System

Relevant
Feedback
Output
The steps involved in the Information Retrieval (IR) system process are as follows:

Step 1 User: The process begins with the user, who has a specific information need. The user formulates and
submits a query to the system, aiming to find relevant documents or data.
Step 2 Query: The user’s query, consisting of keywords or phrases representing the information sought, is passed
to the IR system for processing.

Step 3 IR System: The IR system processes the query, searches through its database, and ranks documents
based on their relevance to the query. This step includes several sub-processes:

Step 3.1 Documents: The system compares the query against a collection of documents (e.g., web
pages, research papers, articles) stored within its database.
Step 3.2 Indexing: The documents are indexed to enable efficient searching. Indexing creates a
structured representation of the data, allowing the IR system to quickly locate relevant
information.
Step 3.3 Indexed Documents: Once indexed, the documents are stored in an organised structure, so
the system can easily retrieve them when a query is received.

Step 4 Relevant Output: After processing, the IR system returns results that best match the user’s query. These
may include ranked lists of documents, summaries, or other relevant data.
Step 5 Feedback: Finally, the user may provide feedback on the results—indicating whether they were useful. This
feedback can be used to refine the system’s performance and improve future search accuracy.

100 Touchpad Artificial Intelligence - XI