yaz_searchPodręcznik PHPPoprzedniNastępnyyaz_search (PHP 4 )yaz_search -- Prepares for a searchDescriptionint yaz_search ( int id, string type, string query) yaz_search() 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 yaz_connect() this function is non-blocking and only prepares for a search to be executed later when yaz_wait() is called. The RPN query 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 (@) are considered operators, otherwise they are treated as search terms. Tabela 1. RPN OperatorsSyntaxDescription@and query1 query2intersection of query1 and query2@or query1 query2union of query1 and query2@not query1 query2query1 and not query2@set nameresult set reference@attrset set queryspecifies attribute-set for query. This construction is only allowed once - in the beginning of the whole query@attr set type=value queryapplies 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.Przykład 1. Query Examples Query computer matches documents where "computer" occur. No attributes are specified. The Query "donald knuth" matches documents where "donald knuth" occur. For the query @attr 1=4 art attribute type is 1 (Bib-1 use), attribute value is 4 Title), so this should match documents where art occur in the title. Another more complex one: @attrset gils @and @attr 1=4 art @attr 1=1003 "donald knuth" 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. PoprzedniSpis treściNastępnyyaz_recordPoczątek rozdziałuyaz_present

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