PHP 忒聊 綴豖 ヶ輛 yaz_search (PHP 4 = 4.0.1) Description yaz_search() prepares for a search on the connection given by id. The type represents the query type - only "rpn" is supported now in which case the third argument specifies a Type-1 query in prefix query notation. 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. 桶跡 1. RPN Operators Construct Description @and query1 query2 intersection of query1 and query2 @or query1 query2 union of query1 and query2 @not query1 query2 query1 and not query2 @set name result set reference @attrset set query specifies attribute-set for query. This construction is only allowed once - in the beginning of the whole query @attr [set] type=value query 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. 瞰赽 1. Query Examples You can search for simple terms, like this computer The Query "knuth donald" This query applies two attributes for the same phrase. @attr 1=1003 @attr 4=1 "knuth donald" This query @and @or a b @not @or c d e Another, more complex, one: @attrset gils @and @attr 1=4 art @attr 1=2000 company You can find information about attributes at the Z39.50 Maintenance Agency site. 蛁: If you would like to use a more friendly notation, use the CCL parser - functions yaz_ccl_conf() and yaz_ccl_parse(). 綴豖 れ萸 ヶ輛 yaz_schema 奻珨撰 yaz_set_option