Linked Data and the Semantic Web

1. the Semantic Web
 - an extension of the current Web in which information is given a well-defined meaning
 - The Annotated Web
  * enrich existing web pages with annotations
  * enable enhanced browsing and searching
 - The Web of Data
  * expose existing databases in a common format
  * express database schema in a machine-understandable form
 - need shared vocabularies to describe objects in these domain of interest => ontologies

On the World Wide Web...	On the Semantic Web...
The World Wide Web is the Web for people  - Technologies include URI, HTTP, XML, HTML  - Information needs humans to give it meaning	The Semantic Web is the Web for machines  - Technologies include RDF, RDFS, OWL  - Information can be interpreted by machines
XML is machine-readable format	RDF is a machine-understandable format  - a framework for interchange formats

 - The triple: underlying model of triples used to describe the relations between entities in the Semantic Web
  * subject - predicate - object

https://www.w3.org/standards/semanticweb/

https://data-gov.tw.rpi.edu/wiki/Triples

2. Linked Data
 - Principles: Set of publishing practice for SW data:
  * Use URIs as names for things
  * use HTTP URIs so that people can look up those names
  * When someone looks up a URI, provide useful information
  * Include links to other URIs, so that they can discover more things

http://www.linkeddatatools.com/semantic-web-basics