# Data Mapper Logstash Logstash provides a data transformation pipeline for analytics data. In the platform it is responsible for transforming FHIR messages into a flattened object that can be inserted into Elasticsearch. ### Input Logstash allows for different types of input to read the data: Kafka, HTTP ports, files, etc. ### Filters With a set of filters and plugins, the data can be transformed, filtered, and conditioned. This allows the creation of a structured and flattened object out of many nested and long resources. Accessing the different fields will be much easier and we will get rid of the unused data. ### Output To save the data, Logstash provides a set of outputs such as: Elasticsearch, S3, files, etc. --- # 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://jembi.gitbook.io/openhim-platform/packages/data-mapper-logstash.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.