Semantic Web Introduction - a perspective of data annotations
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Web documents without metadata provide little useful information for search engines which must parse pages to extract information, while documents with metadata describe keywords and authors but leave content unknown; the semantic web aims to make all web content machine-readable through structured annotation of entities, relationships and meanings using standards like URIs, RDFa and Rich Snippets, allowing search engines to directly access semantic nodes without needing to parse pages.
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Semantic Web Introduction - a perspective of data annotations
- 1. Semantic Web
- 2. „Man muss das Unmögliche tun um das Mögliche zu erreichen.“ - Hermann Hesse.
- 3. Web documents without meta-data ● Plain HTML format without metadata description→ Problem: Search engines need to extract useful information trough parsing tools and also using natural language processing
- 4. Web documents with metadata ● Better documents, describing information about keywords, author, kontext Problem: Even if the header of a web document is annotated, the content remains unknown
- 5. Web documents with structured data ● Content of web documents is annotated and can be used to be recognized by machines A topological query is possible which has access to the nodes of structured data. Any parsing or less parsing is needed
- 6. Semantic Web ● Entities are described via URIs in Dublin Core Format, RDFa, RichSnippet There is a tool from Google to annotate semantics for a web document: http://www.google.com/webmasters/tools/richsni ppets
- 7. Bye