Web Temp help

Can any one tell me how below code works

<A class=SAPBEXBtnStd href="<SAP_BW_URL cmd="PROCESS_HELP_WINDOW" help_service="HW_OPEN_DIALOG" item="TITLE" subcmd="SELECTION" object_type="VW" SUBMIT_PARAMETER="CMD=LDOC&TEMPLATE_ID=ZANALYZER">">Open View</A>

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Please tell me in details. like what is the use of each part of this code. i am new in web.