2 Appendix

Structure

• Chapter 4: Retired Tags
  • Section 4.1: Expanded Tags
  • Section 4.2: Tags without Context
  • Section 4.3: Obsolete Constructions
  • Section 4.4: Reclassified Tags
  • Section 4.5: Retired Subsections
    • Subsection 4.5.1: The Universal Property of $\mathrm{h} \mathit{\operatorname{\mathcal{C}}}$