1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>KFB Syntax</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="../stylesheets/pyke.css" type="text/css" />
</head>
<body>
<table id="page-table">
<thead class="head">
<tr id="header1"><th id="header" colspan="3">
</th></tr>
<tr id="header2">
<th id="crumb-left"></th>
<th id="crumb-line">
<div id="nav">
<ul>
<li><a href="../index.html">Home</a></li>
<li>></li>
<li><a href="index.html">Pyke Syntax</a></li>
<li>></li>
<li>KFB Syntax</li>
</ul>
</div>
</th>
<th id="crumb-right"></th>
</tr>
</thead>
<tbody id="body">
<tr id="body-tr">
<td id="left-nav">
<div id="left-nav-div">
<div class="title-nav"><a href="../index.html">Home</a></div><div class="nav-branch">
<div class="normal-nav"><a href="../about_pyke/index.html">About Pyke</a></div>
<div class="normal-nav"><a href="../logic_programming/index.html">Logic Programming</a></div>
<div class="normal-nav"><a href="../knowledge_bases/index.html">Knowledge Bases</a></div>
<div class="title-nav"><a href="index.html">Pyke Syntax</a></div><div class="nav-branch">
<div class="normal-nav"><a href="kfb_syntax.html">KFB Syntax</a></div>
<div class="normal-nav"><a href="krb_syntax/index.html">KRB Syntax</a></div>
<div class="normal-nav"><a href="kqb_syntax.html">KQB Syntax</a></div>
</div>
<div class="normal-nav"><a href="../using_pyke/index.html">Using Pyke</a></div>
<div class="normal-nav"><a href="../examples.html">Examples</a></div>
<div class="normal-nav"><a href="../PyCon2008-paper.html">PyCon 2008 Paper</a></div>
</div>
</div>
<div id="icons">
<div id="project-page">
<a href="http://sourceforge.net/projects/pyke/">Pyke Project Page</a>
</div>
Please Make a Donation:<br />
<a href="http://sourceforge.net/donate/index.php?group_id=207724">
<img src="http://images.sourceforge.net/images/project-support.jpg"
width="88" height="32" border="0"
alt="Support This Project" /> </a> <br /><br />
Hosted by: <br />
<a href="http://sourceforge.net/projects/pyke">
<img src="http://sflogo.sourceforge.net/sflogo.php?group_id=207724&type=14"
width="150" height="40"
alt="Get Python Knowledge Engine (PyKE) at SourceForge.net. Fast, secure and Free Open Source software downloads" /></a>
</div>
</td>
<td id="main-td">
<div id="main">
<a name="startcontent" id="startcontent"></a>
<div class="document" id="kfb-syntax">
<h1 class="title">KFB Syntax</h1>
<p>This uses the same lexical structure as <a class="reference external" href="index.html#lexical-structure">KRB files</a>, except that the only
keywords are:</p>
<ul class="simple">
<li>None</li>
<li>True</li>
<li>False</li>
</ul>
<p>The name of the <a class="reference external" href="../knowledge_bases/fact_bases.html">fact base</a> is simply the filename with the <tt class="docutils literal">.kfb</tt> suffix
stripped. This must be a valid Python identifier.</p>
<div class="section" id="syntax-for-kfb-file">
<h2>Syntax for KFB File</h2>
<pre class="literal-block">
file ::= [NL] {fact NL}
fact ::= IDENTIFIER '(' [{data,}] ')'
data ::= 'None' | 'True' | 'False'
| NUMBER | IDENTIFIER | STRING
| '(' [{data,}] ')'
</pre>
</div>
<div class="section" id="example">
<h2>Example</h2>
<p>This is taken from the <a class="reference external" href="../examples.html#family-relations">family_relations</a> example:</p>
<pre class="literal-block">
# family.kfb
son_of(bruce, thomas, norma)
son_of(fred_a, thomas, norma)
son_of(tim, thomas, norma)
daughter_of(vicki, thomas, norma)
daughter_of(jill, thomas, norma)
daughter_of(nanette, arthur2, kathleen)
son_of(arthur3, arthur2, kathleen)
daughter_of(sue, arthur2, kathleen)
son_of(ed, arthur2, kathleen)
daughter_of(marilyn, arthur2, kathleen)
son_of(david_b, arthur2, kathleen)
daughter_of(m_helen, arthur2, kathleen)
son_of(m_thomas, bruce, marilyn)
son_of(david_a, bruce, marilyn)
</pre>
<!-- ADD_LINKS MARKER -->
</div>
</div>
<!-- <div id="return-to-top">
<a href="#">Return to Top</a>
</div>
-->
</div>
</td>
<td id="right-nav">
<div id="right-nav-div">
<h3>More:</h3>
<div class="right-item"><a href="kfb_syntax.html">KFB Syntax</a><p>The syntax of <em>Knowledge Fact Base</em> (KFB) files, which is where you
write your universal facts.</p>
</div>
<div class="right-item"><a href="krb_syntax/index.html">KRB Syntax</a><p>Syntax of the <em>Knowledge Rule Base</em> (KRB) files, which is where you
write your rules.</p>
</div>
<div class="right-item"><a href="kqb_syntax.html">KQB Syntax</a><p>The syntax of <em>Knowledge Question Base</em> (KQB) files, which is where you
spell out your end user questions.</p>
</div>
</div>
</td>
</tr>
</tbody>
<tfoot id="foot">
<tr id="foot2">
<td id="copyright" colspan="3">
Copyright © 2007-2009 Bruce Frederiksen
</td>
</tr>
</tfoot>
</table>
<div id="last-modified">
Page last modified
Mon, Oct 27 2008.
</div>
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ?
"https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost +
"google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-6310805-1");
pageTracker._trackPageview();
} catch(err) {}
</script>
</body>
</html>
|
