Greetings,
Thanks for your inputs.
By Grammar I mean the the Language and Grammar which is generally used to generate parsers. When a users fires a search request to the Zimbra Server it contains an element <query> which contains the query user has fired. This query is parsed on the Zimbra Server side by a parser which is generated by Java CC (A Parser generation tool in java) found at https://javacc.dev.java.net/
This tool needs a Language and Grammar to generate a parser as it is with other classical tools like Yacc (mostly used with lex-another tool).
To be specific I would like to know the Grammar for query element in following code
Code:
<soap:Body><SearchRequest xmlns="urn:zimbraMail"
offset="0" limit="25" types="message,contact,appointment,wiki,document"><tz id="(GMT+05.30) Chennai
/ Kolkata / Mumbai / New Delhi"/><locale>en-US</locale>
<query>((from:(swapnil)) OR (from:(ajay))) in:inbox larger:2kb</query>
</SearchRequest></soap
:Body>
Above mentioned search criteria is just an example and there are other various complex scenario's possible for the search criteria in <query></query> node.