What kind of transformations does it potray?

Boccaccio is the master of the meta-narrative. He layers story upon story, interweaving many old tales. As an Italian artist, he participates in the model first laid by Dante in his Divine Comedy. Boccaccio nests his stories within grander stories, using much work from his predating authors. Similar to the phenomenon of sampling in hip-hop and rap, he samples classic folktales and the like from various countries in order to enrich his own storytelling. This is what makes him a master of the meta-narrative. He not only includes historical touchstones, but he makes them work for his own ends in the book. Rather than copy and pasting a story verbatim, he twists it into something which suits his meta-narrative as well. This is true for all 100 stories.