- From: Jitao Yang <jitao.yang@gmail.com>
- Date: Fri, 13 Feb 2009 16:49:42 +0100
- To: olivier Thereaux <ot@w3.org>
- Cc: Jeremy_Carroll@hp.com, www-rdf-validator@w3.org
- Message-ID: <eb1226bd0902130749s658dd763y4f087abd08582bab@mail.gmail.com>
Dear Thereaux, Thank you so much for your reply, I thought 1.7.4 would solve the problem is because in the servlet it mentions that: *********************************************************************** * * Implementation notes: * * o This servlet supports the HTTP POST operation; it does not * support the HTTP GET operation * * o Depending upon the parameters given to the servlet it may * invoke a GraphViz suprocess to generate a graph of the RDF. * See the following for more information about GraphViz: * * http://www.research.att.com/sw/tools/graphviz/ * * The servlet assumes version 1.7.4 of GraphViz. * * o Depending upon the parameters given to the servlet, the RDF * to be validated may be copied to a file. The name of the file * is automatically generated via Java's temporary file APIs. The * location of the directory where the file is stored is configured * via the serverlet's init() method. See below for more information. * * o See the section on Server Initialization for more information. * *********************************************************************** so, I thought maybe it is the version problem. yes, after careful tracing the the codes, i think it is indeed the config problem, I am trying to fix it now. again, thank you very much for your reply. best, jitao On Fri, Feb 13, 2009 at 3:24 PM, olivier Thereaux <ot@w3.org> wrote: > Dear Jitao, dear all. > > On 11-Feb-09, at 5:32 PM, Jitao Yang wrote: > >> I am using ARPServlet.java to develop an application, >> could you please send me a copy of GraphViz 1.7.4, >> since I can not find it from the website of GraphViz any more. >> > > I am not an expert on graphviz, unfortunately, but I can tell with > confidence that the service at http://www.w3.org/RDF/Validator/ uses a > much more recent version of graphviz (2.8-3). Why do you think version 1.7.4 > would solve the problem? > > Looking quickly at the code for ARPServlet.java > http://dev.w3.org/java/classes/org/w3c/rdf/examples/ARPServlet.java > the error you mention happens when running graphviz (as a standalone > script) fails. > > A way to fix the issue would be to first check that the "dot" script works. > > GRAPH_VIZ_FONT_DIR = /Volumes/Macintosh_HD_2/graphviz-2.20.3/graphs >> (I can not find the dir of Fonts) >> > > > Given what you wrote, I strongly suspect that your graphviz config is > problematic. In particular, if you do not have a repository of fonts, maybe > trying to not set that variable at all would be betther than setting it to a > wrong path? > > The graphviz project has a mailing-list and documentation online, hopefully > they should be of interest. > > Hope this helps, > -- > olivier > > >
Received on Friday, 13 February 2009 15:51:20 UTC