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<h4 class="appendixsubsec">D.3.1 Word skipping by context</h4>

<p>This was posted on the Aspell mailing list on January 1, 1999:

   <p>I had an idea on a great general way to determine if a word should be
skipped.  Determine the words to skip based on the symbols that
(almost) always surround the word.

   <p>For example when asked to check the following C++ code:
<pre class="example">     cout &lt;&lt; "My age is: " &lt;&lt; num &lt;&lt; endl;
     cout &lt;&lt; "Next year I will be " &lt;&lt; num + 1 &lt;&lt; endl;
</pre>
   <p><code>cout</code>, <code>num</code>, and <code>endl</code> will all be skipped. 
<code>cout</code> will be skipped because it is always preceded by a
`<samp><span class="samp">&lt;&lt;</span></samp>'.  <code>num</code> will be skipped because it is always preceded
by a `<samp><span class="samp">&lt;&lt;</span></samp>'.  And <code>endl</code> will be skipped because it is always
between a `<samp><span class="samp">&lt;&lt;</span></samp>' and a `<samp><span class="samp">;</span></samp>'.

   <p>Given the following HTML code.
<pre class="example">     &lt;table width=50% cellspacing=0 cellpadding=1&gt;
     &lt;tr&gt;&lt;td&gt;One&lt;td&gt;Two&lt;td&gt;Three
     &lt;tr&gt;&lt;td&gt;1&lt;td&gt;2&lt;td&gt;3
     &lt;/table&gt;
     
     &lt;table cellspacing=0 cellpadding=1&gt;
     &lt;/table&gt;
</pre>
   <p><code>table</code>, <code>width</code> <code>cellspacing</code>, <code>cellpadding</code>,
<code>tr</code>, <code>td</code> will all be skipped because they are always
enclosed in `<samp><span class="samp">&lt;&gt;</span></samp>'.  Now of course <code>table</code> and
<code>width</code> would be marked as correct anyway however there is no
harm in skipping them.

   <p>So I was wondering if anyone on this list has any experience in
writing this sort of context recognition code or could give me some
pointers in the right direction.

   <p>This sort of word skipping will be very powerful if done right.  I
imagine that it could replace specific spell checker modes for TeX,
Nroff, SGML etc because it will automatically be able to figure out
where it should skip words.  It could also probably do a very good job
on programming languages code.

   <p>If you are interested in helping me out with this or just have general
comments about the idea please let me know.

   </body></html>

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