Chapter 1: Traditions in Corpus Design.- Chapter 2: Current Welsh-language Corpora.- Chapter 3: Visions and Aims of CorCenCC.- Chapter 4: Work-flow: The Processes of Corpus Design and Construction.- Chapter 5: Copyright, Permissions and Licenses.- Chapter 6: Spoken Data.- Chapter 7: Written Data.- Chapter 8: E-Language Data.- Chapter 9: Challenges and Solutions.- Chapter 10: Summary and Guidelines for Good Practice.