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<HTML
><HEAD
><TITLE
>yaz_search</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
REL="HOME"
TITLE="PHP Manual"
HREF="manual.html"><LINK
REL="UP"
TITLE="YAZ functions"
HREF="ref.yaz.html"><LINK
REL="PREVIOUS"
TITLE="yaz_record"
HREF="function.yaz-record.html"><LINK
REL="NEXT"
TITLE="yaz_syntax"
HREF="function.yaz-syntax.html"><META
NAME="HTTP_EQUIV"
CONTENT="text/html; charset=ISO-8859-1"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>PHP Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="function.yaz-record.html"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="function.yaz-syntax.html"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.yaz-search"
>yaz_search</A
></H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN40646"
></A
><P
> (PHP4 >= 4.0.1)</P
>yaz_search -- Prepares for a search</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN40649"
></A
><H2
>Description</H2
><DIV
CLASS="funcsynopsis"
><A
NAME="AEN40651"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="function"
>yaz_search</B
></CODE
> (int id, string type, string query)</CODE
></P
><P
></P
></DIV
><P
> <B
CLASS="function"
>yaz_search()</B
> prepares for a search on the
target with given id. The type represents the query type - only
"rpn" is supported now in which case the third argument specifies
a Type-1 query (RPN). Like <A
HREF="function.yaz-connect.html"
><B
CLASS="function"
>yaz_connect()</B
></A
> this
function is non-blocking and only prepares for a search to be
executed later when <A
HREF="function.yaz-wait.html"
><B
CLASS="function"
>yaz_wait()</B
></A
> is called.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN40665"
></A
><H2
>The RPN query</H2
><P
> The RPN query is a textual represenation of the Type-1 query as
defined by the Z39.50 standard. However, in the text representation
as used by YAZ a prefix notation is used, that is the operater
precedes the operands. The query string is a sequence of tokens where
white space is ignored is ignored unless surrounded by double
quotes. Tokens beginning with an at-character (<TT
CLASS="literal"
>@</TT
>)
are considered operators, otherwise they are treated as search terms.
</P
><DIV
CLASS="table"
><A
NAME="AEN40669"
></A
><P
><B
>Table 1. RPN Operators</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><THEAD
><TR
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Syntax</TH
><TH
ALIGN="LEFT"
VALIGN="MIDDLE"
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><TT
CLASS="literal"
>@and query1 query2</TT
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>intersection of query1 and query2</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><TT
CLASS="literal"
>@or query1 query2</TT
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>union of query1 and query2</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><TT
CLASS="literal"
>@not query1 query2</TT
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>query1 and not query2</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><TT
CLASS="literal"
>@set name</TT
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>result set reference</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><TT
CLASS="literal"
>@attrset set query</TT
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>specifies attribute-set for query. This construction is only
allowed once - in the beginning of the whole query</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
><TT
CLASS="literal"
>@attr set type=value query</TT
></TD
><TD
ALIGN="LEFT"
VALIGN="MIDDLE"
>applies attribute to query. The type and value are
integers specifying the attribute-type and attribute-value
respectively. The set, if given, specifies the
attribute-set.</TD
></TR
></TBODY
></TABLE
></DIV
><P
> The following illustrates valid query constructions:
<DIV
CLASS="informalexample"
><A
NAME="AEN40702"
></A
><P
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="screen"
>computer</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
Matches documents where "computer" occur. No attributes are specified.
</P
><P
> <DIV
CLASS="informalexample"
><A
NAME="AEN40705"
></A
><P
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="screen"
>"donald knuth"</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
Matches documents where "donald knuth" occur.
</P
><P
> <DIV
CLASS="informalexample"
><A
NAME="AEN40708"
></A
><P
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="screen"
>@attr 1=4 art</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
Attribute type is 1 (Bib-1 use), attribute value is 4
Title), so this should match documents where "art" occur
in the title.
</P
><P
> <DIV
CLASS="informalexample"
><A
NAME="AEN40711"
></A
><P
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="screen"
>@attrset gils @and @attr 1=4 art @attr 1=1003 "donald knuth"</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>
The query as a whole uses the GILS attributeset. The query matches
documents where "art" occur in the title and in which "donald knuth"
occur in the author.
</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
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