What is semantic search?
6 October 2026

What is semantic search?


Semantic search retrieves data based on query meaning, not keyword matching, by analysing the purchase order table, invoice log, and budget allocation spreadsheet to answer questions about project costs, even if the question does not mention specific tables, and it can integrate data from different systems.

Semantic search is a method of retrieving data based on the meaning of the query, rather than just matching the words used. In practice, this means a system like AsscherAi can answer a question about the total cost of a project by looking at the purchase order table, the invoice log, and the budget allocation spreadsheet, even if the question does not mention any of those specific tables. This is different from traditional search methods, which rely on keyword matching and often return irrelevant results.

Definition and distinction

Semantic search is often confused with natural language processing, but the two are not the same. Natural language processing is a broader field that deals with the interaction between computers and humans in natural language, whereas semantic search is a specific application of natural language processing that focuses on retrieving data based on the meaning of the query. To illustrate the difference, consider a shift supervisor who checks the maintenance log to see when a particular machine was last serviced. A natural language processing system might be able to understand the supervisor's question and generate a response, but a semantic search system would be able to retrieve the relevant information from the maintenance log and other related tables.

The distinction between semantic search and natural language processing is important, because it highlights the specific challenges and opportunities of implementing semantic search in a large organisation. While natural language processing can be used for a wide range of applications, semantic search is particularly well-suited to retrieving data from complex databases and systems.

Applications in a large organisation

In a large organisation, semantic search can be used to retrieve data from a variety of sources, including databases, spreadsheets, and documents. For example, a category manager might use semantic search to compare the prices of different suppliers, by querying the purchase order table and the invoice log. This can help the manager to make informed decisions about which suppliers to use and how to allocate budgets. Similarly, a financial analyst might use semantic search to retrieve data on the organisation's revenue and expenses, by querying the budget allocation spreadsheet and the financial reports.

Semantic search can also be used to integrate data from different systems and departments, providing a unified view of the organisation's data. This can be particularly useful in large organisations, where data is often siloed and difficult to access. By using semantic search, organisations can break down these silos and provide employees with the information they need to make informed decisions.

What it does

Semantic search works by using a combination of natural language processing and machine learning algorithms to understand the meaning of the query and retrieve relevant data. This involves several steps, including tokenisation, part-of-speech tagging, and named entity recognition. The system then uses this information to generate a query that can be executed against the database or other data sources. For more information on how AsscherAi works, you can visit our homepage.

One of the key benefits of semantic search is that it allows users to ask questions in natural language, without having to learn complex query languages or understand the underlying database structure. This makes it easier for employees to access the data they need, and can help to reduce the burden on IT departments. If you have any questions about how semantic search can be used in your organisation, you can contact us at our contact page.

What it does not do

Semantic search is not a magic bullet that can solve all of an organisation's data problems. It is a tool that can be used to retrieve data and answer questions, but it is not a substitute for good data management practices. In particular, semantic search relies on high-quality data that is well-structured and well-maintained. If the data is poor quality or poorly organised, the results of the semantic search will be limited. Most people get wrong that semantic search can fix poor data, but they are wrong.

Additionally, semantic search is not a replacement for human judgment and expertise. While it can provide valuable insights and answer questions, it is not a decision-making tool. Employees will still need to use their own expertise and judgment to interpret the results of the semantic search and make informed decisions. Some common mistakes that people make when implementing semantic search include trying to use it to replace human expertise, or expecting it to fix poor data quality.

When it is the wrong choice

Semantic search is not always the best solution for every problem. In some cases, traditional search methods or other data retrieval tools may be more effective. For example, if the data is relatively simple and well-structured, a traditional search method may be sufficient. Alternatively, if the organisation has a small amount of data and a simple database structure, a semantic search system may be overkill. In these cases, a more straightforward approach may be more effective.

In general, semantic search is most useful in large organisations with complex databases and systems. It is particularly well-suited to retrieving data from multiple sources and providing a unified view of the organisation's data. However, it is not a one-size-fits-all solution, and organisations should carefully evaluate their needs and consider alternative approaches before implementing a semantic search system.

Frequently asked questions

How does semantic search differ from traditional search methods?

Semantic search retrieves data based on query meaning, not keyword matching, providing more relevant results.

Can semantic search be used to integrate data from different systems?

Yes, semantic search can integrate data from different systems, providing a unified view of the organisation's data.

What are the benefits of using semantic search in a large organisation?

Semantic search allows users to ask questions in natural language, reducing the burden on IT departments and providing easier access to data.

Is semantic search a replacement for human judgment and expertise?

No, semantic search is not a replacement for human judgment and expertise, but rather a tool to provide valuable insights and answer questions.