Jigsaw as Open Source vs Closed Source

[ashughes]

Good day,

I am doing a research project for my Bachelor of Software Developement program at Seneca College in Toronto, Canada.  I have gather quite a lot of information for the Jigsaw/W3C website but I have 1 question...

Why does Jigsaw make sense as open source software?  

Thank you,

 
Anthony Hughes