# Industry classification The document outlines the methodology for sector classification of listed companies in the Vietnamese stock market. This document also serves as a contract between the user and the developer, and is considered as input for the analysis, design, and testing of FiinPro-X products. The publication of the sector classification methodology increases transparency and enhances the effectiveness of information usage provided by FiinPro-X to its users. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.fiinpro.com/english/methodology/industry-classification.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.