please I need small clarification about precision and recall in lucene code‏

[Abeer I]

I want to ask about the lucene.benchmark which I used it to mauser the 
precision and recall in my lucene code .

basically I used this code 

File topicsFile = new File("C:\\test\\topicfile.txt");  
    File qrelsFile = new File("C:\\test\\qrles.txt");  
        try (Directory dir = FSDirectory.open(new File("C:\\luceneIndex"))) {
           // org.apache.lucene.search.Searcher searcher = new 
IndexSearcher(dir, true);  
            org.apache.lucene.search.IndexSearcher searcher= new 
IndexSearcher(dir, true);
            String docNameField = "filename";   
            PrintWriter logger = new PrintWriter(System.out, true);   
            TrecTopicsReader qReader = new TrecTopicsReader();   //#1  
            QualityQuery qqs[] = qReader.readQueries( new BufferedReader(new 
FileReader(topicsFile))); //#1  
            Judge judge = new TrecJudge(new BufferedReader(new 
FileReader(qrelsFile)));                     //#2  
            judge.validateData(qqs, logger);                     //#3  
            QualityQueryParser qqParser = new SimpleQQParser("content", 
"path");  //#4  
            
            QualityBenchmark qrun = new QualityBenchmark(qqs, qqParser, 
searcher, docNameField); 
           
 
//org.apache.lucene.benchmark.quality.QualityQuery[],org.apache.lucene.benchmark.quality.QualityQueryParser,org.apache.lucene.search.IndexSearcher,java.lang.String
            SubmissionReport submitLog = null;  
            QualityStats stats[] = qrun.execute(judge,submitLog, logger);  
            QualityStats avg = QualityStats.average(stats);      //#6  
            avg.log("SUMMARY",2,logger, "  ");
         
the topic file format is 
<top>
<num> Number: 0
<title> Financial
<desc> Description:
<narr> Narrative:
</top>

and qrles is
# qnum 0 doc-name is-relevant

0 0 enwiki-20120403-pages-articles.xml-007.txt 1

can
 any one describe what is the meaning of these two file I tried to 
search for recourse that help me with this matter but unfortunately 
nothing helpful. 

how to write these two file (topic file,qrles ) is it don manually, if so what 
is the meaning of the file structure.


thanks