Top "Semantic-web" questions

Representation of database record subjects (a/k/a keys, IDs, entities), predicates (a/k/a columns, attributes), and objects (a/k/a values) as triples, where the first two are always URIs, and the third is either a URI or a literal; enabling humans and machines to more easily share, merge, and evaluate data from heterogeneous origins.

What is the difference between RDF and OWL?

I am trying to grasp the concept of Semantic Web. I am finding it hard to understand what exactly is …

rdf semantic-web owl
Great RDF visualization tools

I want to find some great tools or styles to visualize my RDF data so that it can give viewers …

visualization rdf semantic-web linked-data
Semantics and Structure of Name-Value Pairs

This is a question I have been struggling with for a while. What is the proper way to mark up …

html css semantic-web semantic-markup semantics
Schema.org give a div a itemprop="image"?

I am replacing an image with a <div> with background-image for the reason of background-size: cover; The page …

html css semantic-web semantic-markup schema.org
Are there any tools to visualize a RDF graph? (please include a screenshot)

I'm looking for a tool that will render a RDF graph in a reasonably useful graphic format. The primary purpose …

rdf semantics semantic-web owl ontology
Should I use <meta name="author" content="Your Name" /> or <link rel="author" href="http://mysite.com/about/" />?

In html 5, rel="author" is used to link to information about the author of the page. This can be a …

html seo semantic-web meta-tags
Microdata vs RDFa

I have a quick question about RDFa and Microdata. My current understanding is that RDFa is RDF implemented into HTML …

html semantic-web microdata rdfa
Triple Stores vs Relational Databases

I was wondering what are the advantages of using Triple Stores over a relational database?

relational-database sparql semantic-web jena
SPARQL Querying multiple ORs in the same filter

Ok lets assume I have 5 datatype properties with integers as values. These properties are asserted to individuals belonging to class "…

rdf sparql semantic-web ontology protege
Entity Extraction/Recognition with free tools while feeding Lucene Index

I'm currently investigating the options to extract person names, locations, tech words and categories from text (a lot articles from …

lucene nlp semantic-web mahout opennlp