* source code: rdffederator - Revision 192: /trunk/src
 
   http://code.google.com/p/rdffederator/

* step:

 1. make the corresponding VoID files

  * method 1: 

  1.1 data download:
    
   drugbank:  http://download.bio2rdf.org/release/3/drugbank/  drugbank.nq.gz	19-Dec-2014 13:23	52M
   
   omim:      http://download.bio2rdf.org/release/3/omim/     omim.nq.gz	11-Nov-2014 03:50	124M	 

   pharmgkb:  http://download.bio2rdf.org/release/3/pharmgkb/  diseases.nq.gz  genes.nq.gz     rsid.nq.gz  drugs.nq.gz     offsides.nq.gz  twosides.nq.gz    01-Jun-2014 17:54   2.4G or so

  1.2 ./generate_void.sh ../data/drugbank.nq drugbank_void.n3 

  
{{{
    counting triples and properties
    counting types and entities
    counting distinct objects
    counting distinct subjects
}}}


   
    drugbank: time taken: 91 seconds

    omim: time taken: 411 seconds



 * method 2: 
Made the void files with the statistics queries in the following page:
[https://github.com/bio2rdf/bio2rdf-scripts/wiki/Bio2RDF-Release-3-Summary-Statistics]

2. execute: ./SPLENDID.sh SPLENDID-config.n3 query/query1.txt


For the VoID files with method 1,the following errors occur:
{{{
20:13:36 [WARN ] [Rio error] Expected ':', found '>' (465, -1) (ParseErrorLogger.java:28)
20:13:36 [WARN ] [Rio error] Namespace prefix 'LBSL' used but not defined (465,-1) (ParseErrorLogger.java:28)
20:13:36 [ERROR] [Rio fatal] Not a valid (absolute) URI: null (465, -1) (ParseErrorLogger.java:32)
20:13:36 [ERROR] can not parse VOID file file:/opt/services/fsearch/app/splendid/void/omim.n3: Not a valid (absolute) URI: null [line 465] (VoidStatistics.java:407)
}}}

check the corresponding void files, and deal with the lines as follows. we simply do the following changes:

void:property fusion> =>  void:property <fusion>

Result:

||Query\time(ms) ||time 1 || time 2 || time 3 ||time 4||time 5 ||
||case1 ||6724	||4763	||4766	||4765||	4763||