> For the complete documentation index, see [llms.txt](https://docs.digit.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digit.org/platform/guides/developer-guide/backend-developer-guide/section-0-prep/design-inputs/high-level-design.md).
# High Level Design
## API Specs
Find below the Open API specifications defined for this guide:
[Birth Registration](https://github.com/egovernments/DIGIT-OSS/blob/master/tutorials/backend-developer-guide/btr-services/birth-registration-api-spec.yaml)
## Process Workflow Diagram
## Registries
As a part of this guide, we are going to build a single birth registry. We will re-use the user registry from the DIGIT core. This will capture the mother and father details and store them in the user registry. The baby's details will remain in the birth registry.
## Services
A single birth service will manage the registry.
## System Architecture Diagram
Images in red show the new birth registration service modules
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