What is the difference between keyword-based and concept-based search in information retrieval?

1 Keyword-based search

Keyword-based search is the most widely used method of information retrieval. It involves matching the words or phrases that you enter in a search box with the words or phrases that appear in the documents. For example, if you search for "office supplies", you will get documents that contain the exact words "office supplies". Keyword-based search is fast and simple, but it also has some limitations. First, it may return irrelevant or redundant documents that happen to include the same words as your query, but do not match your intended meaning or context. Second, it may miss relevant documents that use different words or synonyms to express the same concept as your query. For example, if you search for "office supplies", you may not get documents that use terms like "stationery", "equipment", or "materials".

2 Concept-based search

Concept-based search is a more advanced method of information retrieval that tries to overcome the limitations of keyword-based search. It involves understanding the meaning and context of your query and the documents, and finding documents that match your query based on the concepts or topics that they cover, rather than the exact words or phrases that they use. For example, if you search for "office supplies", you will get documents that are about office supplies, regardless of the specific terms or synonyms that they use. Concept-based search is more accurate and comprehensive, but it also requires more sophisticated and complex algorithms and technologies, such as natural language processing, semantic analysis, and machine learning.

3 How to choose between keyword-based and concept-based search

When deciding which type of search to use for your information retrieval needs, you should consider the scope and specificity of your query, the quality and quantity of documents, and the availability and accessibility of the tools. For instance, if you have a broad or general query, concept-based search may be more effective in retrieving a wider range of relevant documents. On the other hand, if you have a narrow or specific query, keyword-based search may be better in finding more precise and relevant documents. Additionally, if you have access to advanced information retrieval tools that support concept-based search, they can help to enhance your search experience and efficiency. Conversely, if you only have access to basic tools that support keyword-based search, they may be sufficient for performing your search tasks.

5 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?