What is the meaning of //<start id="simple"> ... //<end id="simple">

[therefore]

I am a beginner. I'm seeing code like:

// Simple doc
//<start id="simple">
BSONObjBuilder simple;
simple.genOID().append("username", "Jones").append( "zip", 10011 );
BSONObj doc = simple.obj();

cout << doc.jsonString();
//<end id="simple">

Are the comments //<start id="simple"> ... //<end id="simple"> simply a commenting convention or do they have a preprocessor or compiler function?

Thanks!

[Dash]

Any line followed by // is a comment, and is ignored by compilers.

[MrHutch]

I've not worked with BSON/JSON (I'm aware it's for data interchange/serialisation) but, as far as C++ goes, those two lines will do absolutely nothing. :-)

[therefore]

Thanks for the help!