<!DOCTYPE Article PUBLIC "-//GNOME//DTD DocBook PNG Variant V1.1//EN"[
<!ENTITY version "1.2">
]>

<article id="index">
  <artheader> 
    <title>stripchart</title>

    <copyright>
      <year>2000, 2001</year>
      <holder>John Kodis</holder>
    </copyright>

    <!-- translators: uncomment this:
    <copyright>
      <year>2000</year>
      <holder>ME-THE-TRANSLATOR (Latin translation)</holder>
    </copyright>
    -->

    <legalnotice>
      <para>Permission is granted to copy, distribute and/or modify this document
	under the terms of the <ulink type="help"
	url="gnome-help:fdl"><citetitle>GNU Free Documentation
	    License</citetitle></ulink>, Version 1.1 or any later version 
	published by the Free Software Foundation with no Invariant Sections, 
	no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
	can be found <ulink type="help" url="gnome-help:fdl">here</ulink>.
      </para>

      <para>Many of the names used by companies to distinguish their
      products and services are claimed as trademarks. Where those
      names appear in any GNOME documentation, and those trademarks
      are made aware to the members of the GNOME Documentation
      Project, the names have been printed in caps or initial
      caps.</para>
    </legalnotice>

    <releaseinfo>
      This is version 1.0 of the stripchart manual.
    </releaseinfo>
  </artheader>

  <sect1 id="intro">
    <title>Introduction</title> 

    <para>The GNOME <application>stripchart</application> program
    charts various user-specified parameters as a function of time.
    Its main use is to chart system performance parameters such as CPU
    load, CPU utilization, network traffic levels, and the like.
    Other more ingenious uses are left as an exercise for the
    interested user.  It is included in the package
    <filename>gnome-utils</filename>, which is a part of the GNOME
    desktop environment. This document describes version &version; of
    the <application>stripchart</application> program.</para>

    <para>The <application>stripchart</application> program
    periodically reads data from a file, extracts a value, and
    displays these values in one of several formats.  The default
    format is a graphical display similar to that of a stripchart
    recorder.  Hence the name,
    <application>stripchart</application>.</para>

    <figure id="StripchartPlotterMainWindow">
      <title>Stripchart Plotter Main Window</title>
    <screenshot>
      <screeninfo>Stripchart Plotter Main Window</screeninfo>
      <graphic fileref="figures/main" format="png" srccredit="John Kodis">
	  </graphic>
    </screenshot>
    </figure>

    <para>On systems such as Linux, in which system parameters are
    available in human-readable form in the /proc directory, the
    <application>stripchart</application> program makes a dandy
    performance monitoring tool, similar to but more versatile than
    <application>xload</application>.</para>

    <para>Instead of being limited to a few standard performance
    parameters, the <application>stripchart</application> program can
    plot any time-variant parameter than can be read from a file or
    pipe.  This ability to read data from a pipe provides a very
    versatile and easy to use method of setting up custom
    displays.</para>

    <para>The <application>stripchart</application> program is
    available both as a stand-alone program, and as a Gnome panel
    applet.  The program can be started by selecting
    <guimenuitem>Stripchart Plotter</guimenuitem> item from the
    <guisubmenu>Utilities</guisubmenu> submenu of the <guimenu>Main
    Menu</guimenu>, by selecting <guimenuitem>Stripchart
    Plotter</guimenuitem> item from the
    <guisubmenu>Monitors</guisubmenu> submenu of the Gnome panel
    <guimenu>Applets</guimenu>, or by running the command
    <command>stripchart</command> or
    <command>stripchart-applet</command> from the command line.</para>

    <figure id="stripchartappletmainwindow">
      <title>Stripchart Plotter Applet Window</title>
    <screenshot>
      <screeninfo>Stripchart Plotter Applet Window</screeninfo>
      <graphic fileref="figures/applet" format="png" srccredit="John Kodis">
	  </graphic>
    </screenshot>
    </figure>

  </sect1>

  <sect1 id="usage"> 
    <title>Using stripchart</title>

    <para>Although the <application>stripchart</application> program
    can be used to plot very nearly any parameter that is of interest,
    the default configuration will produce a useful overview of the
    performance parameters of the system that it's being run on.  This
    section describes basic usage of the
    <application>stripchart</application> program in its default
    configuration.  A description of how to customize the parameters
    that are plotted is provided later in this document.</para>

    <para>When you first start <application>stripchart</application>,
    you see the <interface>main window</interface>, as shown in 
    <xref linkend="main"> or in <xref linkend="applet">.
      <figure id="main">
	<title>Stripchart Plotter Main Window</title>
	<screenshot>
	  <screeninfo>Stripchart Plotter Main Window</screeninfo>
	  <graphic fileref="figures/main" format="png" srccredit="John Kodis">
	  </graphic>
	</screenshot>
      </figure>
      <figure id="applet">
	<title>Stripchart Plotter Applet Window</title>
	<screenshot>
	  <screeninfo>Stripchart Plotter Applet Window</screeninfo>
	  <graphic fileref="figures/applet" format="png" srccredit="John Kodis">
	  </graphic>
	</screenshot>
      </figure>
    </para>

    <para>In its default configuration, the
    <application>stripchart</application> program creates a 200 by 50
    pixel window that contains two main elements &mdash; a scrolling
    "strip" on the left, and a series of "pens" on the right.  The
    <application>stripchart</application> applet is similar, but its
    size adapts to the size of the panel in which it is run.  When
    using the default configuration, there will be a "pen" and a
    "strip" line showing the current and recently past values of
    system's CPU utilization in blue, the one minute load average in
    yellow, the percentage of swap space in use in white, and the
    inbound and outbound network traffic volumes in red and green,
    respectively.  If a PPP interface is currently active, a green
    indicator light will be displayed in the upper left corner of the
    main window.</para>

    <para>Clicking on the <application>stripchart</application>
    <interface>main window</interface> with mouse button one will pop
    up a <interface>numeric value</interface> window.  The
    <interface>numeric value</interface> window corresponding to the
    main window shown in the previous figures is shown below in <xref
    linkend="text">.
      <figure id="text">
	<title>Parameter Numeric Value Window</title>
	<screenshot>
	  <screeninfo>Parameter Numeric Value Window</screeninfo>
	  <graphic fileref="figures/text" format="png" srccredit="John Kodis">
	  </graphic>
	</screenshot>
      </figure>
    This window provides a multi-line, text-based display of the name,
    current value, full-scale value, and scaling (linear or
    logarithmic) of each of the parameters being plotted.  It can be
    dismissed either by clicking on the <guibutton>close</guibutton>
    button in the title bar of the <interface>numeric
    value</interface> window, or by a second mouse click in the
    <interface>main window</interface>.</para>

    <para>Clicking on the <application>stripchart</application>
    <interface>main window</interface> with mouse button three will
    pop up an <guimenu>Application</guimenu> menu containing
    <guimenuitem>Help</guimenuitem>, <guimenuitem>About</guimenuitem>,
    <guimenuitem>Show values</guimenuitem>, <guimenuitem>Edit
    Prefs</guimenuitem>, <guimenuitem>Edit Params</guimenuitem>, and
    <guimenuitem>Exit</guimenuitem> menu items, as shown below in
    <xref linkend="menu">.
      <figure id="menu">
	<title>Main Window with Pop-Up Menu</title>
	<screenshot>
	  <screeninfo>Main Window with Pop-Up Menu</screeninfo>
	  <graphic fileref="figures/menu" format="png" srccredit="John Kodis">
	  </graphic>
	</screenshot>
      </figure>
    The <guimenuitem>Help</guimenuitem> and
    <guimenuitem>About</guimenuitem> menu items display this help
    information and the usual about box, respectively, and the
    <guimenuitem>Exit</guimenuitem> menu item terminates the execution
    of the <application>stripchart</application> program.  The
    <guimenuitem>Show values</guimenuitem> menu item will pop up a
    <interface>numeric value</interface> window, as described
    above.</para>

    <para>The operation of the <application>stripchart</application>
    application can be customized by editing the application
    preferences and the parameters that are plotted.  The
    <guimenuitem>Edit Prefs</guimenuitem> menu item displays an
    application preferences editing window, as shown in <xref
    linkend="prefs">.  The settings in the Preferences Window are
    described in <xref linkend="preferences">.
      <figure id="prefs">
	<title>Preferences Window</title>
	<screenshot>
	  <screeninfo>Preferences Window</screeninfo>
	  <graphic fileref="figures/prefs" format="png" srccredit="John Kodis">
	  </graphic>
	</screenshot>
      </figure>
    </para>

    <para>The <guimenuitem>Edit Params</guimenuitem> menu item displays a
    window containing a notebook with a page describing the details of
    each parameter, as shown in <xref linkend="param">.  Parameters
    can be edited as described in <xref linkend="parameters">.
      <figure id="param">
	<title>Parameter Window</title>
	<screenshot>
	  <screeninfo>Parameter Window</screeninfo>
	  <graphic fileref="figures/param" format="png" srccredit="John Kodis">
	  </graphic>
	</screenshot>
      </figure>
    </para>
  </sect1>

  <sect1 id="options">
    <title>Command-Line Options</title>

    <para>There are a few command line switches that can be used to
    alter the behavior of the program.  In addition to the common
    help, usage, version, Gnome, Gtk, and Session management options,
    the following stripchart-specific options are available:</para>

    <variablelist>
      <varlistentry>
	<term> --geometry <replaceable>GEOMETRY-SPEC</replaceable> </term> 
	<listitem>
	  <para>A standard X11 geometry specification of the form
	  <replaceable>WxH&plusmn;X&plusmn;Y</replaceable>. </para>
	</listitem>
      </varlistentry>

      <varlistentry>
	<term> --config-file <replaceable>FILENAME</replaceable> </term>
	<listitem>
	  <para>Specifies a file from which to read configuration
	  information, overriding the normal configuration file search
	  order described in <xref linkend="files" />.  You can change
	  the parameters monitored by an instance of the stripchart
	  program by specifying an alternate configuration
	  file.</para>
	</listitem>
      </varlistentry>
    </variablelist>
  </sect1>

  <sect1 id="preferences">
    <title>Preference Settings</title>

    <para>The Preferences Window provides a way to adjust settings
    which have an effect on the overall operation of the
    <application>stripchart</application> program.  Separate sets of
    controls are provided for the operation of the pens and for the
    operation of the main chart window.</para>

    <figure id="stripchartpreferenceswindow">
      <title>Preferences Window</title>
    <screenshot>
      <screeninfo>Preferences Window</screeninfo>
      <graphic fileref="figures/prefs" format="png" srccredit="John Kodis"></graphic>
    </screenshot>
    </figure>

    <para>Both the chart and the pens have their own adjustments for
    the update interval and for the level of smoothing to be
    performed.  The update interval determines how frequently a new
    set of data points should be collected and displayed.  This
    defaults to once per second for the pens, and once every 5 seconds
    for the chart lines.  The smoothing value determines how sharp of
    a low-pass filter should be applied to the raw data values prior
    to displaying them.  This value defaults to 0.5 for both the pens
    and the chart lines.  Setting the smoothing to zero eliminates
    this filtering of the raw data, resulting updates which are more
    responsive but which can appear jumpy or jagged.  Setting the
    smoothing to one freezes the current values in place.
    Intermediate values generate a new plot value by taking the
    difference between the last value and the new raw parameter value,
    multiplying by the smoothing constant, and adding this to the last
    value.</para>

    <para>The chart portion of the Preferences Window also has a
    check-box to enable or disable the display of tick marks along the
    time axis of the stripchart display.  When the display of tick
    marks is enabled, the intervals between minor and major tick marks
    can be adjusted.  The default settings provide for a minor tick
    mark every twelve pixels and a major tick mark every five minor
    tick marks.  With the default five second chart update interval,
    these values will place a minor tick mark every minute and a major
    tick mark every five minutes.</para>

    <para>The pen portion of the Preferences Window provides a
    check-box to enable or disable the display of the pen portion of
    the stripchart display.  While the pens provide a rapidly updating
    view of the parameters being monitored, this constant motion could
    become distracting.  Adjust to taste.</para>

    <para>The standard "Okay", "Apply", and "Cancel" buttons are
    available to apply new settings and close the Preferences dialog
    window, to apply new settings without closing the Preferences
    dialog window, and to close the Preferences dialog window without
    altering the current preference settings, respectively.</para>

  </sect1>

  <sect1 id="parameters">
    <title>Parameter Settings</title>

    <para>The parameters displayed by the
    <application>stripchart</application> can be examined and edited
    using the <interface>Parameter Editor</interface> window.
    Although <application>stripchart</application> provides great
    potential for adding custom parameters, most users will initially
    be satisfied with the selecting from the list of pre-configured
    parameters supplied.  Adding or deleting these parameters is
    described in <xref linkend="param-quickstart">.</para>

    <figure id="stripchartparameterwindow">
      <title>Parameter Window</title>
    <screenshot>
      <screeninfo>Parameter Window</screeninfo>
      <graphic fileref="figures/param" format="png"
	       srccredit="John Kodis"></graphic>
    </screenshot>
    </figure>

    <sect2 id="param-quickstart">
      <title>Parameter Editor Quickstart Guide</title>

      <para>To delete one of the currently active parameters:
      <itemizedlist>

	<listitem><para>Select the parameter to be deleted by clicking
        on its tab at the bottom of the <interface>Parameter
        Editor</interface> window;</para></listitem>

	<listitem><para>Select the <guimenu>Edit</guimenu> menu
	item;</para></listitem>

	<listitem><para>Select the <guimenu>Delete Parameter</guimenu> menu
	item.</para></listitem>

      </itemizedlist></para>

      <para>To add one of the pre-defined parameters:
      <itemizedlist>

	<listitem><para>Select the <guimenu>Edit</guimenu> menu
	item;</para></listitem>

	<listitem><para>Select either the <guimenu>Add Parameter
	Before</guimenu> or the <guimenu>Add Parameter
	Before</guimenu> menu item to insert a new empty parameter
	page;</para></listitem>

	<listitem><para>Select one of the pre-defined parameters from
	the parameter itemlist on the "Parameter" line of the
	page.  This will fill in the required fields for the newly
	created parameter, and begin plotting it.</para></listitem>

      </itemizedlist></para>

    </sect2>

    <sect2 id="custom">
      <title>Creating Custom Parameters</title>

      <para>The creation of a custom parameter can be done by editing
      an existing parameter, by adding a new parameter and editing it,
      or by adding a new parameter and filling in the parameter fields
      from scratch.  Many of the parameter fields can be left blank.
      While good style dictates that a parameter name and description
      be provided for documentation purposes, the only mandatory
      fields are those required to obtain a value to be plotted.
      Generally, the Equation field will fill this role.  The details
      of each of these fields are described below.</para>

      <variablelist>

        <varlistentry>
	  <term>Parameter</term>
	  <listitem>

	    <para>A short descriptive name for the parameter.</para>

	  </listitem>
        </varlistentry>

        <varlistentry>
	  <term>Description</term>
	  <listitem>

	    <para>A longer description of the parameter.</para>

	  </listitem>
        </varlistentry>

	<varlistentry>
	  <term>Filename</term>
	  <listitem>

	    <para>The name of a file from which equation parameters
	    are obtained.  On each iteration, a line is read from this
	    file.  If a pattern was supplied, lines are read until one
	    is found that contains the pattern string anywhere in the
	    line.  This line is split into a series of whitespace
	    separated fields, each of which is interpreted as a
	    floating point number.  The first (or only) value is
	    denoted by $1, the next by $2, and so forth.  The
	    difference between the field values from the previous to
	    the current iteration is denoted by ~1, ~2, and so
	    forth.</para>

	    <para>If a filename beginning with a "|" is supplied,
	    input lines will be read from a pipe instead of a file.
	    Lines read from this pipe will be processed identically to
	    lines read from a file as described previously.</para>

	    <para>If a filename beginning with a "?" is supplied, the
	    file status determines the value to be plotted: -1 for a
	    non-existent file, 0 for a file of zero length, 1 for a
	    file with an access time that is newer than its
	    modification time, and 2 for a file with a modification
	    time that is newer than its access time.  These values are
	    useful in displaying the status of a mailbox file.</para>

	  </listitem>
	</varlistentry>

        <varlistentry>
	  <term>Equation</term>
	  <listitem>

	    <para>An equation used to obtain the value to be plotted
            for this parameter.  The equation is made up of parameters
            which are combined using the usual infix arithmetic
            operators.</para>

	    <para>There are several sources for equation
	    parameters.</para>

            <itemizedlist>

	      <listitem><para>The parameters can be obtained by
	      reading a line from a file.  This method of obtaining
	      equation parameters is described under the previous
	      Filename section.</para></listitem>

	      <listitem><para>There are a number of built-in
	      parameters.  The elapsed time in seconds between the
	      last and current iteration is ~t.  The elapsed time in
	      seconds since the <application>stripchart</application>
	      program was started is $t.</para></listitem>

	      <listitem><para>There are a number of parameters
	      provided by the libgtop library.  These are described in
	      <xref linkend="libgtop">.</para></listitem>

            </itemizedlist>

	    <para>The usual infix arithmetic operators &mdash;
	    addition (+), subtraction (-), multiplication (*),
	    division (/), and remaindering (%) &mdash; are available,
	    along with parenthesis for grouping subexpressions, and
	    unary minus (-) to negate a value.  Grouping and negation
	    have the highest precedence; multiplication, division, and
	    remaindering have the next highest precedence; and
	    addition and subtraction have the lowest
	    precedence.</para>

	  </listitem>
        </varlistentry>

	<varlistentry>
	  <term>Pattern</term>
	  <listitem>

	    <para>If the filename field specifies a file containing
	    more than a single line of text, the pattern field can be
	    used to select the line from which equation parameter
	    values will be obtained.  Lines will be read from the file
	    until a line containing the specified pattern is found, or
	    until the end of file is reached.  If no pattern is
	    provided, the first line of the file is used.</para>

	  </listitem>
	</varlistentry>

        <varlistentry>
	  <term>Top Min</term>
	  <term>Top Max</term>
	  <term>Bottom Min</term>
	  <term>Bottom Max</term>
	  <listitem>

	    <para>The minimum and maximum to be used for the value at
	    the top and bottom of the chart.</para>

	  </listitem>
        </varlistentry>

        <varlistentry>
	  <term>Scale</term>
	  <listitem>

	    <para>The type of scaling to be performed on the parameter
	    values before they are plotted: either linear or
	    logarithmic.</para>

	  </listitem>
        </varlistentry>

        <varlistentry>
	  <term>Type</term>
	  <listitem>

	    <para>The type of plot to be generated for this parameter
	    value.  The value can be plotted as an indicator, a small
	    square in the upper left corner of the window; as a line
	    drawn between successive parameter values; as a point for
	    each parameter value; or as a solid, with the area below
	    each parameter value solidly filled in.</para>

	  </listitem>
        </varlistentry>

        <varlistentry>
	  <term>Color</term>
	  <listitem>

	    <para>The color or colors to be used when plotting this
	    parameter value.  For an indicator plot, a series of
	    colors are used, the first for parameter values of one,
	    plus or minus one-half, two, plus or minus one-half,
	    three, plus or minus one-half, and so on.  For line,
	    point, and solid plot types, only a single color is
	    used.</para>

	  </listitem>
        </varlistentry>

      </variablelist>

    </sect2>

    <sect2 id="libgtop">
      <title>libgtop Values</title>

      <para>Normally, the <application>stripchart</application>
      program will be built with the libgtop library linked in.  The
      libgtop library provides a portable and well-standardized method
      of accessing common system performance parameters.  This is the
      preferred method of obtaining a value to be plotted.</para>

      <para>The following libgtop parameters are available: </para>

      <itemizedlist>
	<listitem> <para>CPU Statistics &mdash; cpu_total,
	    cpu_user, cpu_nice, cpu_sys, cpu_idle, and cpu_freq
	    </para> </listitem>

	<listitem> <para>Memory Statistics &mdash; mem_total,
	    mem_used, mem_free, mem_shared, mem_buffer, mem_cached,
	    mem_user, mem_locked </para> </listitem>

	<listitem> <para>Swap Statistics &mdash; swap_total,
	    swap_used, swap_free, swap_pagein, swap_pageout </para>
	</listitem>

	<listitem> <para>Uptime Statistics &mdash; uptime, idletime
	    </para> </listitem>

	<listitem> <para>Loadavg Statistics &mdash; load_running,
	    load_tasks, load_1m, load_5m, load_15m </para> </listitem>

	<listitem> <para>Network Statistics &mdash; net_pkts_in,
	    net_pkts_out, net_pkts_total, net_bytes_in, net_bytes_out,
	    net_bytes_total, net_errs_in, net_errs_out, net_errs_total
	    </para> 

	  <para>Note that the network statistic values don't use the
	    libgtop library.  Instead, they are read directly from
	    /proc/net/dev, and so are only available under
	    Linux. </para> </listitem>
      </itemizedlist>

      <para>These are all signed long integer quantities, except for
      uptime, idletime, and the five load values which are floating
      point values. </para>

    </sect2>
  </sect1>

  <sect1 id="files">
    <title>Configuration and Parameter Files</title> 

    <para>The <application>stripchart</application> program
    determines the parameters to display by reading a configuration
    file.  The <application>stripchart</application> program will
    look for a configuration file in the following order:
    <itemizedlist>

      <listitem> <para>first, for a file specified on the command
      line, </para> </listitem>

      <listitem> <para>then, for a file named
      <filename>stripchart.conf</filename> in the current working
      directory, </para> </listitem>

      <listitem> <para>then, for a file named
      <filename>.stripchart.conf</filename> in the users home
      directory, </para> </listitem>

      <listitem> <para>then, for a file named
      <filename>/etc/stripchart.conf</filename>, </para> </listitem>

      <listitem> <para>and finally, for a file named
      <filename>stripchart.conf</filename> in the
      <replaceable>CONFDIR</replaceable> directory, which will usually
      be either <filename
      class="directory">/usr/share/stripchart/</filename> or
      <filename
      class="directory">/usr/local/share/stripchart/</filename>.
      </para> </listitem>

    </itemizedlist>

    If no configuration file is found, the program displays an error
    message and exits.</para>

    <para>The canned parameters that are displayed in the
    <interface>Parameter Editor</interface> window are read from the
    <filename>stripchart.param</filename> file in the <filename
    class="directory"> <replaceable> {prefix}/share/stripchart
    </replaceable> </filename> directory.</para>

  </sect1>

  <sect1 id="bugs">
    <title>Known bugs and limitations</title>

    <para>The --geometry option doesn't interpret negative
    position arguments correctly.</para>

    <para>The network traffic parameters are only available under
    Linux.</para>

  </sect1>

  <sect1 id="authors">
    <title>Authors</title>

    <para>The <application>Stripchart Plotter</application> was
    written by John Kodis (<email>kodis@jagunet.com</email>). Please
    send all comments, suggestions, and bug reports to the <ulink
    url="http://bugzilla.gnome.org" type="http">GNOME bug tracking
    database</ulink>. (Instructions for submitting bug reports can be
    found <ulink url="http://bugs.gnome.org/Reporting.html"
    type="http"> on-line</ulink>.) If you are using GNOME 1.1 or
    later, you can also use <application>Bug Report Tool</application>
    (<command>bug-buddy</command>), available in the
    <guisubmenu>Utilities</guisubmenu> submenu of <guimenu>Main
    Menu</guimenu>, for submitting bug reports.</para>

    <para>This manual was written by John Kodis
    (<email>kodis@jagunet.com</email>). Please send all comments and
    suggestions regarding this manual to the <ulink type="http"
    url="http://www.gnome.org/gdp">GNOME Documentation Project</ulink>
    by sending an email to <email>docs@gnome.org</email>. You can also
    add your comments online by using the <ulink type="http"
    url="http://www.gnome.org/gdp/doctable/">GNOME Documentation
    Status Table</ulink>.</para>

    <!-- For translations: uncomment this:
    <para>Latin translation was done by ME
    (<email>MYNAME@MYADDRESS</email>).  Please send all comments and
    suggestions regarding this translation to SOMEWHERE.</para>
    -->
  </sect1>

  <sect1 id="license">
    <title>License</title> <para>This program is free software; you
    can redistribute it and/or modify it under the terms of the
    <citetitle>GNU General Public License</citetitle> as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.</para>

    <para>This program is distributed in the hope that it will be
    useful, but WITHOUT ANY WARRANTY; without even the implied
    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    See the <citetitle>GNU General Public License</citetitle> for more
    details.</para>

    <para>A copy of the <citetitle>GNU General Public
    License</citetitle> is included as an appendix to the
    <citetitle>GNOME Users Guide</citetitle>.  You may also obtain a
    copy of the <citetitle>GNU General Public License</citetitle> from
    the Free Software Foundation by visiting <ulink type="http"
    url="http://www.fsf.org">their Web site</ulink> or by writing to
    <address>Free Software Foundation, Inc.  <street>59 Temple
    Place</street> - Suite 330 <city>Boston</city>, <state>MA</state>
    <postcode>02111-1307</postcode> <country>USA</country>
    </address></para>

  </sect1>
</article>
