text: **THREE-LAYER DESIGN**
  Creative Commons (CC) license has three layers: 
  
  "Legal Code" (base layer): contains terms and conditions to be 
  used by lawyers and legally applicable in court. 
  "Human Readable" (commons deeds): contain the summary of 
  the legal code and key terms. 
  "Machine Readable": contains HTML or codes for machines to 
  recognize a work is available under a Creative Commons license. 