XML message about search results of materials
<MaterialSearchResult version="2.0" xmlns="http://www.isapi.org/ver20/XMLSchema">
<searchID><!--required, xs:string, search ID, which is used to check whether the current search request is the same as the previous one.; searchID is valid for 5 minutes--></searchID>
<responseStatus><!--required, xs:boolean, whether it is searched: "true"-yes, "false"-no--></responseStatus>
<responseStatusString><!--required, xs:string, search status: "true+OK"-no more results, "true+MORE"-there are more results not returned, "FAILED"-search failed, "PARAM ERROR"incorrect parameters, "TIMEOUT"-timed out--></responseStatusString>
<totalMatches><!--required, xs:integer, total number of returned results-></totalMatches>
<numOfMatches><!--required, xs:integer, number of matched results--></numOfMatches>
<MaterialList><!--optional, matched material list-->
</Material><!--required-->
</MaterialList>
</MaterialSearchResult>