How to view the .jtl file from excel

Want to open the .jtl file  in the MS excel.  We need to do:

•     Open the .jtl file from a wordpad or notepad 

•    Insert the following line:

<?xml-stylesheet type="text/xsl" href="C:\apps\apache-jmeter-2.12\extras\jmeter-results-report_21.xsl"?>

This line is giving the location of  the style sheet file, it is located in the installed JMeter  extras folder. And it should be put in here:

<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="C:\apps\apache-jmeter-2.12\extras\jmeter-results-report_21.xsl"?>

<testResults version="1.2">

• Save the .jtl file after insert xml line 
• Open the MS Excel worksheet, and drag and drop this .jtl file into it.   

In the excel file the column title are such as "by","dt", "lb" etc. What do they mean? the following list is the meaning of them:

Attribute	Content
by	Bytes
de	Data encoding
dt	Data type
ec	Error count (0 or 1, unless multiple samples are aggregated)
hn	Hostname where the sample was generated
it	Idle Time = time not spent sampling (milliseconds) (generally 0)
lb	Label
lt	Latency = time to initial response (milliseconds) - not all samplers support this
ct	Connect Time = time to establish the connection (milliseconds) - not all samplers support this
na	Number of active threads for all thread groups
ng	Number of active threads in this group
rc	Response Code (e.g. 200)
rm	Response Message (e.g. OK)
s	Success flag (true/false)
sc	Sample count (1, unless multiple samples are aggregated)
t	Elapsed time (milliseconds)
tn	Thread Name
ts	timeStamp (milliseconds since midnight Jan 1, 1970 UTC)
varname	Value of the named variable (versions of JMeter after 2.3.1)