Sophie: php-manual-ro-0:20051028-1 noarch

php-manual-ro-20051028-1.noarch.rpm

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><H1
><A
NAME="function.yaz-search"
></A
>yaz_search</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN125680"
></A
><P
>    (PHP 4 &#62;= 4.0.1, PHP 5)</P
>yaz_search&nbsp;--&nbsp;Prepares for a search</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN125683"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>yaz_search</B
> ( resource id, string type, string query)<BR
></BR
><P
>&#13;     <B
CLASS="function"
>yaz_search()</B
> prepares for a search on the
     connection given by parameter <VAR
CLASS="parameter"
>id</VAR
>.
     The parameter <VAR
CLASS="parameter"
>type</VAR
> represents the query type - only
     <VAR
CLASS="literal"
>"rpn"</VAR
> is supported now in which case the
     third argument specifies a Type-1 query in prefix query notation.
     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="AEN125704"
></A
><H2
>The RPN query</H2
><P
>&#13;     The RPN query is a textual representation 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 unless surrounded by double quotes. Tokens beginning
     with an at-character (<VAR
CLASS="literal"
>@</VAR
>) are considered operators,
     otherwise they are treated as search terms.
    </P
><DIV
CLASS="table"
><A
NAME="AEN125708"
></A
><P
><B
>Tabel 1. RPN Operators</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL
WIDTH="1*"
TITLE="construct"><COL
WIDTH="2*"
TITLE="description"><THEAD
><TR
><TH
>Construct</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><VAR
CLASS="literal"
>@and</VAR
> query1 query2</TD
><TD
>intersection of query1 and query2</TD
></TR
><TR
><TD
><VAR
CLASS="literal"
>@or</VAR
> query1 query2</TD
><TD
>union of query1 and query2</TD
></TR
><TR
><TD
><VAR
CLASS="literal"
>@not</VAR
> query1 query2</TD
><TD
>query1 and not query2</TD
></TR
><TR
><TD
><VAR
CLASS="literal"
>@set</VAR
> name</TD
><TD
>result set reference</TD
></TR
><TR
><TD
><VAR
CLASS="literal"
>@attrset</VAR
> set query</TD
><TD
>specifies attribute-set for query. This construction is only
               allowed once - in the beginning of the whole query</TD
></TR
><TR
><TD
><VAR
CLASS="literal"
>@attr</VAR
> [set] type=value query</TD
><TD
>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
><TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN125742"
></A
><P
><B
>Exemplu 1. Query Examples</B
></P
><P
>&#13;     You can search for simple terms, like this
      <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>computer</PRE
></TD
></TR
></TABLE
>
      which matches documents where "computer" occur.
      No attributes are specified.
    </P
><P
>&#13;     The Query
      <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>"knuth donald"</PRE
></TD
></TR
></TABLE
>
     matches documents where "knuth donald" occur (provided that the
     server supports phrase search).
     </P
><P
>&#13;     This query applies two attributes for the same phrase.
      <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>@attr 1=1003 @attr 4=1 "knuth donald"</PRE
></TD
></TR
></TABLE
>
     First attribute is type 1 (Bib-1 use), attribute value is 1003
     (Author).
     Second attribute has is type 4 (structure), value 1 (phrase),
     so this should match documents where Donald Knuth is author.
     </P
><P
>&#13;      This query
      <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>@and @or a b @not @or c d e</PRE
></TD
></TR
></TABLE
>
      would in infix notation look like
        <VAR
CLASS="literal"
>(a or b) and ((c or d) not e)</VAR
>.
     </P
><P
>&#13;     Another, more complex, one:
<TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>@attrset gils @and @attr 1=4 art @attr 1=2000 company</PRE
></TD
></TR
></TABLE
>
     The query as a whole uses the GILS attributeset. The query matches
     documents where <VAR
CLASS="literal"
>art</VAR
> occur in the title (GILS,BIB-1)
     and in which <VAR
CLASS="literal"
>company</VAR
> occur as Distributor (GILS).
     </P
></DIV
></TD
></TR
></TABLE
><P
>&#13;     You can find information about attributes at the 
     <A
HREF="http://www.loc.gov/z3950/agency/defns/bib1.html"
TARGET="_top"
>Z39.50 Maintenance Agency</A
>
     site.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Not&#227;: </B
>
      If you would like to use a more friendly notation,
      use the CCL parser - functions <A
HREF="function.yaz-ccl-conf.html"
><B
CLASS="function"
>yaz_ccl_conf()</B
></A
> and 
      <A
HREF="function.yaz-ccl-parse.html"
><B
CLASS="function"
>yaz_ccl_parse()</B
></A
>.
     </P
></BLOCKQUOTE
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