p.712: The first sentence in the Block-Presentational Module section should read, "The next module, XHTML1-blkpres.mod, shown in Listing 20-15, defines the hr and the center block-level presentational elements for both the transitional and the strict DTDs." That is, change "structural" to "presentational".
p.712: The caption of Listing 20-15 should read "XHTML1-blkpres.mod: the block presentational module".
p. 720: The caption of Listing 20-21 should read "XHTML1-frames.mod: the frames module".
p. 723: The first sentence in the Linking Module section should read, "The next module imported by both strict and transitional DTDs, XHTML1-linking.mod, shown in Listing 20-21, is another simple module that defines the linking elements a, base, and link."
p. 723: The caption of Listing 20-21 should read "XHTML1-linking.mod: the linking module".
p.737: In the first sentence of The Table Module section, "Listing 20-15" should be "Listing 20-27".