2 Appendix

Structure

• Chapter 6: Retired Tags
  • Section 6.1: Expanded Tags
  • Section 6.2: Tags without Context
  • Section 6.3: Obsolete Constructions
  • Section 6.4: Reclassified Tags
  • Section 6.5: Retired Subsections
    • Subsection 6.5.1: Definitions
    • Subsection 6.5.2: The Universal Property of $\mathrm{h} \mathit{\operatorname{\mathcal{C}}}$