# Specifications This section provides a structured and comprehensive technical overview of DIGIT HCM. It is divided into three main segments: 1. [**Functional Specifications** ](https://docs.digit.org/health/ph-v1.8/access/public-health-product-suite/health-campaign-management-hcm/specifications/functional-specifications)– Detailed documentation of core modules, including campaign type setup, inventory management, beneficiary data handling, boundary hierarchies, system user roles, and more 2. [**Role Action Mapping**](https://docs.digit.org/health/ph-v1.8/access/public-health-product-suite/health-campaign-management-hcm/specifications/role-action-mapping) – Defines the permissions and actions available to each system role—from system administrators to registrars, supervisors, warehouse managers, and programme managers—ensuring clarity, security, and accountability 3. [**Building Blocks & Services** ](https://docs.digit.org/health/ph-v1.8/access/public-health-product-suite/health-campaign-management-hcm/specifications/building-blocks-and-services)– Highlights the modular architecture of HCM, emphasising reusable, configurable building blocks—such as registries and service modules—that support adaptability, scalability, and seamless interoperability across campaigns and systems --- # 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.digit.org/health/ph-v1.8/access/public-health-product-suite/health-campaign-management-hcm/specifications.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.