# 4.2 2nd layer: Data inquiry Data inquiry layer is connected to data accumulation layer by using blockchain engine and provides data output interface for user’s healthcare data management. Since data inquiry layer utilizes user’s healthcare data and EMR with international standard specifications as services by reprocessing them, it is possible to sort necessary data by means of conditional searches. User is provided with fees-paid service that utilizes only the functions of data inquiry layer and physicians can obtain benefits in accordance with efficient execution of clinical studies. Institute/corporation receives assistance in the maintenance or improvement of the insurance coverage of medical products through guaranteeing of the quality of data and information, and assistance in the innovative treatment product development. --- # 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://lemonchain.gitbook.io/lemonchain_whitepaper_v1.9_eng/whitepaper/4.-technical-details-of-lemonchain/4.2-2nd-layer-data-inquiry.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.