sharepoint - CAML IN operator and AND operator with multiple condition -


the following caml query not working me.. not aware sharepoint platform. using sp 2007 , trying use in operator lookup field.

"<where>"                                 + "<and>"                                 + "<and>"                                 + "<in>"                                 + "<fieldref name='role'/>"                                 + "<values>"                                 + "<value type = 'text'>a</value>"                                 + "<value type = 'text'>b</value>"                                 + "</values>"                                 + "</in>"                                 + "<leq>"                                 + "<fieldref name='enddate'/><value type = 'datetime'>" + sputility.createiso8601datetimefromsystemdatetime(dt) + " </value>"                                 + "</leq>"                                 + "</and>"                                 + "<includes>"                                 + "<fieldref name='menu'/><value type='text'>benefits</value>"                                 + "</includes>"                                 + "</and>"                                 + "</where>";

the above query not return have values in list above combination.

if modify query following w/o using in working fine.

"<where>"                                 + "<and>"                                 + "<and>"                                 + "<eq>"                                 + "<fieldref name='role'/>"                                 //+ "<values>"                                 + "<value type = 'text'>a</value>"                                 //+ "<value type = 'text'>b</value>"                                 //+ "</values>"                                 + "</eq>"                                 + "<leq>"                                 + "<fieldref name='enddate'/><value type = 'datetime'>" + sputility.createiso8601datetimefromsystemdatetime(dt) + " </value>"                                 + "</leq>"                                 + "</and>"                                 + "<includes>"                                 + "<fieldref name='menu'/><value type='text'>benefits</value>"                                 + "</includes>"                                 + "</and>"                                 + "</where>";

(please don't suggest me use caml query builder cuz cannot install on dev box. , haven't install sp wss in local :) )

the in operator caml introduced in sharepoint 2010. cannot use in sharepoint 2007. achieve same result have write or's instead.

<or>  <eq>   <fieldref name='role' />   <value type='text'>a</value>  </eq>  <eq>   <fieldref name='role' />   <value type='text'>b</value>  </eq> </or>

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