257 lines
22 KiB
HTML
257 lines
22 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>Microsoft Index Server Guide: Internet Data Query Files</title>
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<meta name="FORMATTER" content="Microsoft FrontPage 1.1">
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<meta name="GENERATOR" content="Microsoft FrontPage 1.1">
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</head>
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<body bgcolor="#FFFFFF">
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<!--Headerbegin--><p align=center><a name="TOP"><img src="onepix.gif" alt="Space" align=middle width=1 height=1></a> <a href="default.htm#Top"><img src="toc.gif" alt=" Contents" align=middle border=0 width=89 height=31></a> <a href="webhits.htm"><img src="previous.gif" alt="Previous" align=middle border=0 width=32 height=31></a> <a href="htxhelp.htm"><img src="next.gif" alt="Next" align=middle border=0 width=32 height=31></a> </p>
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<hr>
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<!--Headerend--><p><a name="InternetDataQueryFiles"><font size=6><strong>Internet Data Query Files</strong></font></a></p>
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<p align=left><!--Chaptoc--></p>
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<blockquote>
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<p><a href="idqhelp.htm#namesection">Names Section</a> <br>
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<a href="idqhelp.htm#qrysection">Query Section</a> <br>
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<a href="idqhelp.htm#SeqQuery">Effect of Parameters on Query Performance</a> <br>
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</p>
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</blockquote>
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<hr>
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<!--ChaptocEnd--><p>Internet Data Query files (files with an .idq extension) for Microsoft Index Server (together with the form parameters) specify
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the query that Microsoft Index Server will run. The .idq file is divided into two sections, the <a href="#namesection">names section</a> and the <a href="#qrysection">query
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section</a>. The names section is optional, and need not be supplied for standard queries. </p>
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<p><a name="IDQ-HTXPath"><strong>Note</strong></a><strong>   </strong>All paths to .idq files must be the full path name from a virtual root, not a relative path or a physical path. In other
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words, all paths must start with a slash and cannot contain “.” or “..” components. See the following examples:</p>
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<blockquote>
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<p><strong>Valid Paths</strong><br>
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/scripts/myquery.idq<br>
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/scripts/samples/search/query.idq</p>
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</blockquote>
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<blockquote>
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<p><strong>Invalid Paths</strong><br>
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c:\inetsrv\scripts\myquery.idq<br>
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scripts/query.idq <br>
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/samples/../scripts/query.idq <br>
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</p>
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</blockquote>
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<p>The .idq files cannot be on a virtual root pointing to a remote Uniform Naming Convention (UNC) share.</p>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="namesection">Names Section</a></h1>
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<p>The names section of the Internet Data Query file defines nonstandard column names that can be referred to in the query. The
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columns refer to ActiveX™ properties that have been created in document files with IPropertyStorage, or in the Microsoft®
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Office summary and custom properties. The globally unique identifier (GUID) for Microsoft Office is
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0xF29F85E0,0x4FF9,0x1068,0xAB9108002B27B3D9. The following sample defines a few of the ActiveX Summary
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Information properties: </p>
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<blockquote>
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<pre><font size=3><tt>[Names]
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#Property set for OLE document properties
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DocTitle = F29F85E0-4FF9-1068-AB91-08002B27B3D9 2
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DocSubject( DBTYPE_STR|DBTYPE_BYREF ) = F29F85E0-4FF9-1068-AB91-08002B27B3D9 3
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DocAuthor( DBTYPE_STR|DBTYPE_BYREF ) = F29F85E0-4FF9-1068-AB91-08002B27B3D9 4
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DocEditTime( DBTYPE_DATE ) = F29F85E0-4FF9-1068-AB91-08002B27B3D9 0xa
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DocLastPrinted( DBTYPE_DATE ) = F29F85E0-4FF9-1068-AB91-08002B27B3D9 0xb
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DocPageCount( DBTYPE_I4 ) = F29F85E0-4FF9-1068-AB91-08002B27B3D9 0xe
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DocWordCount( DBTYPE_I4 ) = F29F85E0-4FF9-1068-AB91-08002B27B3D9 0xf
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SalesRegion( DBTYPE_WSTR | DBTYPE_BYREF ) = D5CDD505-2E9C-101B-9397-08002B2CF9AE "SalesRegion"</tt></font></pre>
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</blockquote>
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<p>Within the section, any blank line, or a line beginning with a number sign (<tt>#</tt>) is ignored. Other lines consist of a <em>friendly name</em>,
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optionally followed by a <em>datatype</em> in parenthesis, followed by an equal sign (=), then a <a href="glossary.htm#GUID">GUID</a> identifying the <em>property set</em> for
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the column, followed by either a number or a string giving the <a href="glossary.htm#PROPID">PROPID</a> or the <em>property name,</em> respectively. If no datatype is
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provided, DBTYPE_WSTR is assumed.</p>
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<p>The friendly name is the token in query restrictions, sort specifications, and so on. Multiple friendly names can point to the
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same property. For example, the friendly name “Author” might be replaced by “Auteur” if an author property is to be shown
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to a French audience. Friendly names cannot contain spaces or special characters such as angle brackets, equal signs,
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exclamation points, commas, periods, and asterisks (>=<!,.*).</p>
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<p>The GUID and PROPID/property name is the name of the property within the ActiveX property namespace. See the Win32
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Software Development Kit (SDK) for more information on ActiveX properties. The PROPID may be specified as a decimal
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(base 10) or in hexadecimal (base 16) number. In the latter case, the number must be preceded by 0x. Property names must
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be enclosed in quotation marks. For example, “10” is not the same as 10.</p>
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<p>The datatype is used during restriction parsing to correctly interpret user input. The following table lists the datatypes
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supported, their equivalent ActiveX mnemonics, and any formatting restrictions.</p>
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<div align=left>
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<table border=1 cellpadding=5 cellspacing=0 width=100%>
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<tr><th align=left valign=bottom width=15%><font size=2>Datatype</font></th><th align=left valign=bottom width=15%><font size=2>ActiveX
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mnemonics</font></th><th align=left valign=bottom width=70%><font size=2>Formatting restrictions</font></th></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_I1</font></td><td valign=top width=15%><font size=2>VT_I1</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number, for example, 0x3F8.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_UI1</font></td><td valign=top width=15%><font size=2>VT_UI1</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_I2</font></td><td valign=top width=15%><font size=2>VT_I2</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_UI2</font></td><td valign=top width=15%><font size=2>VT_UI2</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_I4</font></td><td valign=top width=15%><font size=2>VT_I4</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_UI4</font></td><td valign=top width=15%><font size=2>VT_UI4</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_I8</font></td><td valign=top width=15%><font size=2>VT_I8</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_UI8</font></td><td valign=top width=15%><font size=2>VT_UI8</font></td><td valign=top width=70%><font size=2>Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires
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0x before the number.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_R4</font></td><td valign=top width=15%><font size=2>VT_R4</font></td><td valign=top width=70%><font size=2>Real number. Can be expressed in scientific notation.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_R8</font></td><td valign=top width=15%><font size=2>VT_R8</font></td><td valign=top width=70%><font size=2>Real number. Can be expressed in scientific notation.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_CY</font></td><td valign=top width=15%><font size=2>VT_CY</font></td><td valign=top width=70%><font size=2>Currency. Expressed as two integers, separated by a period, for example, 100.55. Cannot be
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preceded by $, ¥, £, and so on. This datatype does not specify the currency format.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_DATE</font></td><td valign=top width=15%><font size=2>VT_DATE</font></td><td valign=top width=70%><font size=2>Date. Expressed as an absolute in two forms: <em>yyyy/mm/dd</em> and <em>yyyy/mm/dd hh:mm:ss</em>. Also
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expressed as a relative date: -#y, -#m, -#w, -#d, -#h, -#n, -#s where the letters correspond to year,
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month, week, day, hour, minute and second, respectively. Positive relative dates into the future are
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not supported.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_BOOL</font></td><td valign=top width=15%><font size=2>VT_BOOL</font></td><td valign=top width=70%><font size=2>Boolean. Expressed as TRUE or FALSE.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_STR</font></td><td valign=top width=15%><font size=2>VT_LPSTR</font></td><td valign=top width=70%><font size=2>String. Any input accepted.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_WSTR</font></td><td valign=top width=15%><font size=2>VT_LPWSTR</font></td><td valign=top width=70%><font size=2>Unicode string. Any input accepted.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_BSTR</font></td><td valign=top width=15%><font size=2>VT_BSTR</font></td><td valign=top width=70%><font size=2>Basic string. Any input accepted.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_GUID</font></td><td valign=top width=15%><font size=2>VT_CLSID</font></td><td valign=top width=70%><font size=2>GUID (Globally Unique IDentifier). Expressed as <em>xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.</em></font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_BYREF</font></td><td valign=top width=15%><font size=2>(not applicable)</font></td><td valign=top width=70%><font size=2>Older operator. Should be added to strings. For example: DBTYPE_WSTR | DBTYPE_BYREF.</font></td></tr>
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<tr><td valign=top width=15%><font size=2>DBTYPE_VECTOR</font></td><td valign=top width=15%><font size=2>VT_VECTOR</font></td><td valign=top width=70%><font size=2>Older operator. Vector properties are fully supported.</font></td></tr>
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<tr><td><font size=2>VT_FILETIME</font></td><td><font size=2>VT_FILETIME</font></td><td><font size=2>Expressed as an absolute in two forms: <em>yyyy/mm/dd</em> and <em>yyyy/mm/dd hh:mm:ss</em>. Also expressed as
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a relative date: -#y, -#m, -#w, -#d, -#h, -#n, -#s where the letters correspond to year, month, week,
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day, hour, minute and second, respectively. Positive relative dates into the future are not
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supported.</font></td></tr>
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</table>
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</div>
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<p>The friendly names are always available, even if they are not explicitly defined in the names section. See <a href="qrylang.htm#PropertyNamesList">List of Property
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Names</a> on the “Query Language” page. For other Microsoft Office properties, see the Microsoft Office Software Developer’s
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Kit (SDK). For properties available with other products, see the documentation for each independent software vendor.</p>
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<p>The <a href="filtrhlp.htm">HTML filter</a> extracts text from the content field of a meta element. For example, if an HTML file has this line:</p>
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<blockquote>
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<pre><META NAME="DESCRIPTION" CONTENT="Sample query form for Microsoft Index Server"></pre>
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</blockquote>
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<p>Then a user can query the information in the content field, namely “Sample query form for Microsoft Index Server”, by using
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the HTML meta property. The <a href="glossary.htm#GUID">GUID</a> for the meta property is D1B5D3F0-C0B3-11CF-9A92-00A0C908DBF1 and the
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property name is specified by the name field, or the HTTP-EQUIV field. In the above example, the property name is
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<tt>DESCRIPTION</tt>. Thus a friendly name, say MetaDescription, for the meta property can be defined as </p>
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<blockquote>
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<pre>MetaDescription(DBTYPE_WSTR) = D1B5D3F0-C0B3-11CF-9A92-00A0C908DBF1 description</pre>
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</blockquote>
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<p>The GUID for meta property is a registry parameter located at </p>
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<blockquote>
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<pre>HKEY_LOCAL_MACHINE
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 \System
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  \CurrentControlSet
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   \Control\HtmlFilter
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    \MetaTagClsid</pre>
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</blockquote>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="qrysection">Query Section</a> </h1>
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<p>The query section of the .idq file specifies parameters that will be used in the query. It can refer to form variables and can
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include conditional expressions to set a variable to alternative values depending upon some condition. The section begins with
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a [Query] tag, and is followed by a set of parameters. Here is a simple .idq file:</p>
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<blockquote>
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<pre>[Query]
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CiScope=/
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CiColumns=FileName
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CiRestriction=#filename *.*
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CiTemplate=/Scripts/Template.htx</pre>
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</blockquote>
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<p>The preceding four parameters are required. In many cases, one or more parameters will be passed down from a form. Here
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is a very simple form:</p>
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<blockquote>
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<pre><FORM ACTION="/scripts/simple.idq" METHOD="GET">
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Query : <INPUT TYPE="TEXT" NAME="Restriction" SIZE="60" MAXLENGTH="100" VALUE="">
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<INPUT TYPE="SUBMIT" VALUE="Execute Query">
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</FORM></pre>
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</blockquote>
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<p>This form can work with the following .idq file to pass parameters through from the user:</p>
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<blockquote>
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<pre>[Query]
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CiScope=/
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CiColumns=FileName
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CiRestriction=%Restriction%
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CiTemplate=/Scripts/Template.htx</pre>
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</blockquote>
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<p><a href="htxhelp.htm#ifstatement">Conditional expressions</a> can also be used in .idq files in exactly the same manner as .htx files. In addition to the four parameters
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shown earlier, there are many other optional parameters. Common additions include <a href="idq-vars.htm#CiSort"><strong>CiSort</strong></a> and <a href="idq-vars.htm#CiForceUseCi"><strong>CiForceUseCi</strong></a>. See the <a href="idq-vars.htm#idqvars">full
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list</a> of additions.</p>
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<hr>
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<p><font color="#FF0000"><strong>Warning</strong></font><strong>   </strong>Be careful when substituting parameters for the <a href="idq-vars.htm#CiTemplate"><strong>CiTemplate</strong></a> parameter because you could unintentionally allow
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files in execute-only scripts directories to be sent over the network. For example, if an .idq file contained the line </p>
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<blockquote>
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<pre>CiTemplate=%CiTemplate%</pre>
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</blockquote>
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<p>a client could send a URL that contained the following line in the query string:</p>
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<blockquote>
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<pre>CiTemplate=/scripts/mysecretfile.pl</pre>
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</blockquote>
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<p>With this string, an unauthorized user could read the contents of a confidential file.</p>
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<p>It is better to switch among different. htx files by just using the base name of the file and adding the script directory and file
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name extension in the parameter substitution. The following file, Sample.idq, shows how to do this:</p>
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<blockquote>
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<pre>[Query]</pre>
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<blockquote>
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<pre>CiRestriction=%q%
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CiTemplate=/scripts/%t%.htx
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CiSort=%s%
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CiScope=/</pre>
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</blockquote>
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</blockquote>
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<p>The query can be executed with a URL like the following:</p>
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<blockquote>
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<pre>http://<em>computername</em>/scripts/sample.idq?q=ActiveX&t=form1</pre>
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</blockquote>
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<hr>
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<h1><a href="#TOP"><img src="up.gif" alt="To Top" align=middle border=0 width=14 height=11></a><a name="SeqQuery">Effect of Parameters on Query Performance</a></h1>
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<p>The fastest query is a <em>sequential</em> query that uses the <em>content index</em>. Certain parameter settings will force the query engine to
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use a less efficient method to resolve the query. To guarantee fast queries, set <a href="idq-vars.htm#CiSort"><strong>CiSort</strong></a> to nothing (or descending by rank) set
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<a href="idq-vars.htm#CiForceUseCi"><strong>CiForceUseCi</strong></a> to TRUE, and do not reference <a href="idq-vars.htm#CiMatchedRecordCount"><b>CiMatchedRecordCount</b></a>, <a href="idq-vars.htm#CiRecordsNextPage"><b>CiRecordsNextPage</b></a><b>,</b> or
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<a href="idq-vars.htm#CiTotalNumberPages"><b>CiTotalNumberPages</b></a> in the .htx template.</p>
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<p><strong>Note:</strong> A Uniform Resource Locator (URL) or a form-based query can send up to 4 kilobytes (K) of data. If a query larger
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than 4K is sent, the behavior is unpredictable. The query size includes all variables sent from the browser to the .idq file.</p>
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<h2>Sequential versus Nonsequential Execution</h2>
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<p>A query can be executed sequentially (results fetched as needed) or it can be executed nonsequentially (results cached on the
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server). A sequential query requires fewer server resources, but also has some limitations. Backwards scrolling
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(<a href="idq-vars.htm#CiBookmarkSkipCount"><strong>CiBookmarkSkipCount</strong></a> < 0) will re-execute the query and scroll forward to the specified position. Sequential queries
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cannot refer to the following variables: <a href="idq-vars.htm#CiMatchedRecordCount"><b>CiMatchedRecordCount</b></a>, <a href="idq-vars.htm#CiRecordsNextPage"><b>CiRecordsNextPage</b></a>, and <a href="idq-vars.htm#CiTotalNumberPages"><b>CiTotalNumberPages</b></a><strong>.</strong></p>
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<p>Either of the following actions will force a query to be nonsequential:</p>
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<ul>
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<li><p align=left>Referring to the <a href="idq-vars.htm#CiMatchedRecordCount"><b>CiMatchedRecordCount</b></a>, <a href="idq-vars.htm#CiRecordsNextPage"><b>CiRecordsNextPage</b></a> or <a href="idq-vars.htm#CiTotalNumberPages"><b>CiTotalNumberPages</b></a> variables in the .htx
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page.</p>
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</li>
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<li><p align=left>Setting the <a href="idq-vars.htm#CiSort"><strong>CiSort</strong></a> parameter to a sort other than the native order of the result. <strong>CiSort</strong> can safely be set to sort
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ascending on WorkId (<tt>CiSort=WorkId[a]</tt>) or descending on Rank (<tt>CiSort=Rank[d]</tt>).</p>
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</li>
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</ul>
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<h2>Enumerated versus Indexed Resolution</h2>
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<p>Executing queries that must be <em>enumerated</em> can also slow down performance. Most queries are resolved by using the content
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index, but certain conditions force the query engine to recursively search the disk to locate matching files. These queries
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include:</p>
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<ul>
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<li><p align=left>Regular expressions on properties other than FileName which begin with a wildcard.</p>
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</li>
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<li><p align=left><a href="qrylang.htm#PropertyValueQueries">Property value queries</a> when <a href="idq-vars.htm#CiForceUseCi"><strong>CiForceUseCi</strong></a> is set to FALSE and the index is not up-to-date.</p>
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</li>
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<li><p align=left><a href="qrylang.htm#PropertyValueQueries">Property value queries</a> involving regular expressions with a wildcard prefix on a property other than <strong>FileName</strong> (for
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example, <tt>#DocAuthor *son</tt>).</p>
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</li>
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<li><p align=left><a href="qrylang.htm#PropertyValueQueries">Property value queries</a> involving regular expressions that start and end with wildcards (for example, <tt>#filename
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*sample*</tt>).</p>
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</li>
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<li><p align=left>Certain property value queries involving <strong>OR</strong> (such as <tt>@write > -1d OR @create > -1d</tt>).</p>
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</li>
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</ul>
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<p>Queries can be forced to use the content index by setting <a href="idq-vars.htm#CiForceUseCi"><strong>CiForceUseCi</strong></a> to <strong>TRUE</strong> in the .idq file. The query engine will
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always use the content index, but query results may be out-of-date for recently modified files. If the content index was used for
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a query, and some files on disk have been modified more recently than their contents have been filtered, the built-in variable
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<a href="idq-vars.htm#CiOutOfDate"><b>CiOutOfDate</b></a> will be set to the value 1. In some cases, a query is simply too complex to be resolved solely through use of the
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content index. In these cases, the built-in variable <a href="idq-vars.htm#CiQueryIncomplete"><strong>CiQueryIncomplete</strong></a> will be set to 1. Content queries can always be out of
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date and can use the content index anytime.</p>
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<h2>Deferring Nonindexed Trimming</h2>
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<p>Special support has been put in Index Server to optimize content queries that are sorted descending by rank (CiSort =
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Rank[d]). For such queries, minimal information can be retrieved from the index, before additional property and security tests
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are performed. However, if the total number of results matching the query is greater than <a href="idq-vars.htm#CiMaxRecordsInResultSet"><strong>CiMaxRecordsInResultSet</strong></a> then
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additional testing must be performed during index retrieval to remove items from this set that fail additional property and
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security tests. This frees up space in the result set for items matching the full query. This processing uses up resources, and can
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be deferred by setting <a href="idq-vars.htm#CiDeferNonIndexedTrimming"><strong>CiDeferNonIndexedTrimming</strong></a> to <strong>TRUE</strong>. The query will then pick <a href="idq-vars.htm#CiMaxRecordsInResultSet"><strong>CiMaxRecordsInResultSet</strong></a>
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items first, and trim those. The end result may be a number of matching items less than <a href="idq-vars.htm#CiMaxRecordsInResultSet"><strong>CiMaxRecordsInResultSet</strong></a>. For
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queries with the scope set to the entire corpus, on a server with little or no security, you can consider setting
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<a href="idq-vars.htm#CiDeferNonIndexedTrimming"><strong>CiDeferNonIndexedTrimming</strong></a> to <strong>TRUE</strong> to improve performance.</p>
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