Mobility Data Specification (MDS)
MDS standardizes communication and data-sharing between cities and private mobility providers, such as e-scooter and bike-share companies.
Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond.
Schema.org vocabulary can be used with many different encodings, including RDFa, Microdata and JSON-LD. These vocabularies cover entities, relationships between entities and actions, and can easily be extended through a well-documented extension model. Over 10 million sites use Schema.org to markup their web pages and email messages. Many applications from Google, Microsoft, Pinterest, Yandex and others already use these vocabularies to power rich, extensible experiences.

MDS standardizes communication and data-sharing between cities and private mobility providers, such as e-scooter and bike-share companies.

HXL is a different kind of data standard, designed to improve information sharing during a humanitarian crisis without adding extra reporting burdens.

The Digital Public Goods Standard is a set of specifications and guidelines designed to maximise consensus about whether a digital solution conforms to the definition of a digital public good: open-source software, open data, open AI models, open standards, and open content that adhere to privacy and other applicable best practices, do no harm by design and are of high relevance for attainment of the United Nations 2030 Sustainable Development Goals (SDGs).

CityGML is an open data model and XML-based format for the storage and exchange of virtual 3D city models.