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<tr><td valign="middle" align="left">[<a href="Representation-of-Numeric-and-Textual-Data.html#Representation-of-Numeric-and-Textual-Data" title="Previous section in reading order"> &lt; </a>]</td>
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<td valign="middle" align="left">[<a href="avram_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
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<td valign="middle" align="left">[<a href="avram_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
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<a name="Filter-Mode-Interface-1"></a>
<h2 class="section">2.5 Filter Mode Interface</h2>

<a name="index-filter-mode-2"></a>
<a name="index-parameter-mode-3"></a>
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<p>From the point of view of the application developer or compiler writer,
there are parameter mode applications, which are discussed in
<a href="Parameter-Mode-Interface.html#Parameter-Mode-Interface">Parameter Mode Interface</a>, and filter mode applications,
which are discussed in this section. Of the latter, there are mainly
three kinds: those that read one character at a time, those that read a
line at a time, and those that read the whole standard input file at
<a name="index-standard-input-4"></a>
once. Each of them is invoked with different options and expected to
follow different calling conventions. This section summarizes these
conventions.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="Loading-All-of-Standard-Input-at-Once.html#Loading-All-of-Standard-Input-at-Once">2.5.1 Loading All of Standard Input at Once</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">  
</td></tr>
<tr><td align="left" valign="top"><a href="Line-Maps.html#Line-Maps">2.5.2 Line Maps</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">                   
</td></tr>
<tr><td align="left" valign="top"><a href="Byte-Transducers.html#Byte-Transducers">2.5.3 Byte Transducers</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">            
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