What is meant by Text filter?

A "text filter" is a tool or function in software that allows texts to be filtered, modified, or analyzed based on certain criteria. These criteria can take various forms, including keywords, strings, patterns, or rules, and are used to identify or process specific passages of text.

Typical functions of software in the area of "text filtering" could include:

Keyword filtering: Filtering texts based on specific keywords or phrases to extract relevant information or remove unwanted content.
Pattern recognition: Identifying text passages that match a specific pattern or syntax, such as regular expressions.
Removing stop words: Removing commonly occurring words like "and," "or," "but," etc., which contribute little to the meaning of the text.
Language analysis: Analyzing the text for linguistic features such as sentence structure, parts of speech, or sentence meaning.
Sentiment analysis: Identifying and classifying the mood or feeling expressed in a text, such as positive, negative, or neutral.
Tokenization: Breaking down the text into individual words or tokens for further processing or analysis.
Customizing filter rules: Adjusting filter rules or parameters based on the specific requirements or conditions of the user.
Real-time filtering: Applying text filters in real-time during text input or processing to achieve immediate results.