Documentation/Geo data

There are multiple vocabularies for encoding geo position information, but due to the strong support by major search engines, we recommend using the http://schema.org properties

@prefix s:  foo:pos a gr:Location; gr:name "Hepp's Bagel Restaurant Munich - Bagel Street"; s:address [ a s:PostalAddress; s:streetAddress "Bagel Street 1234"; s:postalCode "12345"; s:addressLocality "Munich, Germany" ]; s:latitude 45.75; s:longitude 49.98; s:telephone "+49-89-12345678-0"

TBD: global URIs of schema.org properties!