Gremlin supports declarative pattern matching. See http://www.slideshare.net/slidarko/the-gremlin-traversal-language/37 http://www.slideshare.net/slidarko/the-g

Gremlin supports declarative pattern matching. See http://www.slideshare.net/slidarko/the-gremlin-traversal-language/37 http://www.slideshare.net/slidarko/the-gremlin-traversal-lan... and http://www.slideshare.net/slidarko/the-gremlin-traversal-language/38 http://www.slideshare.net/slidarko/the-gremlin-traversal-lan....