Ontology and holarchy

Is there an explicit internet ontology for resource types and their APIs?

Yes, there is an explicit Internet ontology for resource types and their APIs, which is called the Resource Description Framework (RDF). RDF is a framework for representing information in the form of subject-predicate-object triples, and it provides a standard way to describe resources on the Internet and their relationships to other resources.

In RDF, each resource is identified by a URI (Uniform Resource Identifier), which serves as a unique identifier for that resource. The RDF vocabulary includes a set of predefined classes and properties that can be used to describe the type and attributes of resources.

In addition to RDF, there are also other ontology frameworks and vocabularies that can be used to describe resource types and their APIs, such as the Web Ontology Language (OWL) and Schema.org. These frameworks provide a standardized way to represent and share information about resources on the Internet, making it easier to create and integrate web applications and services.

Is there any map of all of those types and actual instances of them?

There are several initiatives and projects that aim to create maps or directories of resource types and instances described using RDF and other semantic web technologies. Some of the most well-known initiatives include:

• Schema.org: This is a collaborative project between major search engines, including Google, Microsoft, and Yahoo!, to create a common vocabulary for describing the content of web pages. The Schema.org vocabulary includes a wide range of resource types, such as events, products, people, organizations, and more.

• DBpedia: This is a community-driven project that aims to extract structured information from Wikipedia and make it available as linked open data. DBpedia provides a comprehensive ontology that describes a wide range of concepts and entities, and it also includes links to other RDF datasets, such as Freebase and GeoNames.

• Linked Open Vocabularies (LOV): This is a catalog of over 700 vocabularies and ontologies that can be used to describe resources on the web. LOV provides detailed information about each vocabulary, including its scope, version history, and links to related resources.

• Linked Data Cloud: This is a visualization of the interconnected web of RDF datasets, which provides a visual representation of the relationships between different resource types and instances.

These initiatives provide a valuable resource for developers and researchers who are interested in exploring and integrating semantic web technologies into their applications and projects.