Merge pull request #3905 from shaedrich/semantic-web

Add topic semantic web

topics/semantic-web/index.md

@@ -0,0 +1,11 @@
+---
+display_name: Semantic Web
+short_description: The Semantic Web is an extension of the World Wide Web to make Internet data machine-readable. 
+topic: semantic-web
+related: semantic-html, rdf, linked-data, microformats, microdata
+wikipedia_url: https://en.wikipedia.org/wiki/Semantic_Web
+created_by: Tim Berners-Lee, James Alexander Hendler, Ora Lassila
+---
+The Semantic Web is an extension of the World Wide Web through standards set by the [World Wide Web Consortium (W3C)](https://github.com/topics/w3c). The goal of the Semantic Web is to make Internet data machine-readable.
+
+This can be seen in various aspects of web development, one being [semantic HTML](https://github.com/topics/semantic-html) as a way to give your [markup](https://github.com/topics/markup) meaning, [microformats](https://github.com/topics/microformats) like [schema.org](https://github.com/topics/schema-org) or [linked-data](https://github.com/topics/linked-data) like [json-ld](https://github.com/topics/json-ld). Another aspect is from the opposite perspective: Reading and interpreting data. This can be done with metadata via [RDF](https://github.com/topics/rdf).