LogonOnline

Page Status

This page presents user-supplied information, hence may be inaccurate in some details, or not necessarily reflect use patterns anticipated by the LOGON developers. The functionality documented here is not officially supported and may still change. This page was initiated by EmilyBender; please feel free to make additions or corrections as you see fit. However, before revising this page, one should be reasonably confident of the information given being correct.

Running a web demo

The script www, found in the root directory of the LOGON distribution (the value of the environment variable $LOGONROOT), creates web-accessible demos of parsing, generation, or translation systems. The script as distributed contains appropriate customization for all grammars distributed with the standard LOGON tree, for example:

  CD $LOGONROOT
  ./www --binary --erg --port 8888

The above should result in an on-line web demo at port 8888 of your web server. Note, however, that many firewalls block access to user ports, so at least for external access you may have to talk to the IT crowd.

Adding a grammar

• add a command line option and startup code to the www script;

• create three additional files for each grammar:

  • lingo/lkb/src/tsdb/html/language.html: HTML boilerplate with information about the grammar

  • lingo/lkb/src/tsdb/js/language.js: sample sentences

  • language.lisp, if your cpu definition makes reference to one

• make sure there are appropriate cpu definitions, i.e. either adding to

  dot.tsdbrc in $LOGONROOT or (preferably) using a command like push() in the per-user .tsdbrc to augment the list of pre-defined cpus.

Exporting data from an [incr tsdb()] profile for a JavaScript file

1. Select the itsdb profile you want to work from in the itsdb podium.

2. In the Common Lisp buffer (in the tsdb package), do something like the following:

  (loop
      for item in (analyze *tsdb-data*
                   :condition "readings > 0 && readings < 10 && i-length < 10")
      do (let ((i-id (get-field :i-id item))
               (i-input (get-field :i-input item))
               (readings (get-field :readings item)))
           (format
            t
            "  { id: ~a, item: \"~a\", readings: ~a},~%" 
            i-id i-input readings)))

The condition string should be customized to select the examples you want for the sample data file. The format string matches what is required by the JavaScript system.

Other observations

A few other quirks we noted setting this up at UW:

• The user starting the demo has to have write (not just read) permission on the grammar. (At UW, we have a separate user for this web process, which means we end up making the grammar group writable.)

• There of course has to be a ~/tmp/ directory; the standard LOGON configuration (see the LogonInstallation page) should have seen to this.

• The PVM daemon pvmd3 has to be running.