ApiDOM is a semantic parser for API specifications that provides a single, unifying structure for describing APIs across different API description languages and serialization formats like OpenAPI, RAML, API Blueprint, JSON, YAML, and XML. It solves the problem of developers needing to handle each format individually by allowing parsers to parse to a single structure and enabling tool builders to consume one structure for all formats. This project is for developers who work with APIs and need a standardized way to parse and manipulate API specifications across multiple formats.