Definitions and definition sources missing from phenAtmoFront.ttl

[charlesvardeman]

During the community workshop, it was noted that definitions and sources for definitions were missing from phenAtmoFront. Given that this is common, a markdown document with recommendations for providing examples of how to do this annotation with at least rdfs:comment. Vocabularies for reference source and alt definitions would also be useful.

[JimBiardCics]

You can find a list of front types at

http://glossary.ametsoc.org/wiki/Front

Many of the different front types (though not all) already exist in SWEET.

[pbuttigieg]

Watch out for typos in the label! #144