in deadlock report does mode=x mean index, table, or key?

Reading a deadlock report when the resource-list reports mode=x, is that an exclusive lock on the entire index (or table?), or just on a particular key?

Up in the process list sections, both sides report waitresource=key locks.

Thanks,

Josh

  resource-list

   keylock hobtid=72057595802288128 dbid=7 objectname=tcs_prod.dbo.timecard_header

indexname=idx_timecard_header

-- timecard_no(ck,separate pk)

id=lock3bf4cc900 mode=X associatedObjectId=72057595802288128

    owner-list

     owner id=process769462bc8 mode=X

    waiter-list

     waiter id=processe3d708 mode=U requestType=wait

   keylock hobtid=72057595885649920 dbid=7 objectname=tcs_prod.dbo.timecard_header

indexname=idx_th_empid_pd_isdel

-- employee_id,pay_date,is_deleted

id=lock28c343680 mode=U associatedObjectId=72057595885649920

    owner-list

     owner id=processe3d708 mode=U

    waiter-list

     waiter id=process769462bc8 mode=U requestType=wait