What is the exposition of the mats story by Francisco Arcellana?

"The Mats" by Francisco Arcellana is a story that revolves around a family reunion and the ritual of presenting a handcrafted mat as a family heirloom. The exposition of the story sets the scene of a typical Filipino family gathering and introduces the various characters who have gathered to honor their deceased ancestors. The mats symbolize the family's history, traditions, and connections to their past.