anchor.diff:  
   We would like to acknowledge Daniel Kupitz who laid the early foundation of work that follows. Many thanks getting us started *three-cheers* :)
   
  -This work is a sub-task of a bigger goal: LITMUS, an open extensible framework for benchmarking diverse data management solutions Proposal - [https://arxiv.org/pdf/1608.02800.pdf] | First working prototype - [https://hub.docker.com/r/litmusbenchmarksuite/litmus/]
  +This work is a sub-task of a bigger goal: LITMUS, an open extensible framework for benchmarking diverse data management solutions Proposal - [https://arxiv.org/pdf/1608.02800.pdf] | conference paper - [https://dl.acm.org/citation.cfm?doid=3132218.3132232](_best research paper award_) | First working prototype - [https://hub.docker.com/r/litmusbenchmarksuite/litmus/]
  +
  +The foundation research work on Gremlinator can be accessed from - [https://arxiv.org/pdf/1801.02911.pdf] | A simple  demonstration of Gremlinator can be accessed from - [http://gremlinator.iai.uni-bonn.de:8080/Demo/] | A short video tutorial on how to use the demonstration can be accessed from - [https://www.youtube.com/watch?v=Z0ETx2IBamw] 
   
   ##The proposed extentions are listed as follows:
   
  
positive.code: }
  ----
  
  Pattern Matching using Query modifier - Order By
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  .Select all vertices with the label `person` and order by their age.
  [source,SPARQL]
  ----
  SELECT * WHERE {
  
negative.code: } ORDER BY (?age)
  ----
  
  Query modifier - Group By
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  .Select all vertices with the label `person` and group them by their age.
  ----
  SELECT * WHERE {
    ?person v:label "person" .
    ?person v:age ?age .
  } ORDER BY (?age)
  ----
  
  
   SPARQL queries with Group By + Count
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  example coming soon
  
  
  
  SPARQL mixed/complex/aggregation-based queries 
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  example coming soon
  
  
  SPARQL Star-shaped queries 
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  example coming soon
  
  
  Limitations
  -----------
  
  1. Gremlinator currently only supports SPARQL 1.0 specification
  2. SPARQL queries with variables in the predicate position are not currently covered, with an exception of the following case:
  ----
  SELECT * WHERE { ?x ?y ?z .}
  ----
  
  
  Future work
  -----------
  1. cover all cases of SPARQL queries with variables in predicate position
  2. cover SPARQL 1.1 specification (such as Property Paths)
  
  