# Layout specification This is the layout specification for Saral App. Layout ROIs are captured in this format and configured in the backend for each exam. Internally Saral App uses this json interface for predicting ROIs. Checkout Github release tag and refer Release v1.5 refer `Project-Saral/specs/v1.5/saral-physical-layout-representation-specs.yaml` Release v1.0 refer `Project-Saral/specs/v1/saral-physical-layout-representation-specs.yaml` ![](/files/pB2vHRn34jX15C4BNdJ6) 1. The **Cell** is a field-level grouping of ROIs. It is a group of ROI's which will be predicted and grouped together. For example, Student ID may have 13 ROI's(for 13 digits) and they are all grouped under one cell to represent the student ID field as a whole. 2. ROI(Region Of Interest) is an area of interest in the image that will be used as input to predict/recognize a character/digit/OMR. `Refer` [Source Code Repository](/engage/source-code-repository.md) --- # 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://saral.sunbird.org/learn/specifications/layout-specification.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.