So what do they mean and what is the purpose for these standards? Most of the web standards are defined by The World Wide Web Consortium (
W3C). They describe all types of standards for the Document Type (for example XHTML), Cascading Style Sheets (CSS), Web Content Accessibility Guidelines plus many more.
Lets have a look at them in more details:
- Document Types
- Cascading Style Sheets (CSS)
- Web Content Accessibility
Metadata schemas
Each metadata schema will usually have the following characteristics:
- a limited number of elements
- the name of each element
- the meaning of each element
Below you will find a list of the most popular metadata schemas:
- Dublin Core (Most popular)
- AACR2 (Anglo-American Cataloging Rules)
- GILS (Government Information Locator Service)
- EAD (Encoded Archives Description)
- IMS (IMS Global Learning Consortium)
- AGLS (Australian Government Locator Service)
While the syntax is not strictly part of the metadata schema, the data will be useless if the encoding scheme does not match the semantics of the metadata schema. The encoding allows computer programs to process the metadata. List of important schemes can be found below:
- HTML(Hyper-Text Markup Language)
- XHTML (eXtensible Hyper-Text Markup Language )
- SGML (Standard Generalised Markup Language)
- XML (eXtensible Markup Language)
- RDF (Resource Description Framework)
- MARC (MAchine Readable Cataloging)
- MIME (Multipurpose Internet Mail Extensions)
