from mclow:

In the tables, the term is "key equality predicate"
In the text, the term used is "key equality function"

Should pick one and use it everywhere.

• Page 769: …alled the key equality predicate of the container. 5 Two values k1 and k…
• Page 769: …ntainer’s key equality predicate returns true when passed those values.…
• Page 770: …eq as the key equality predicate. § 23.2.5 770 ⃝c ISO/IEC N4567 Table 1…
• Page 771: …() as the key equality predicate. X(n) X X a(n) Requires: hasher and…
• Page 771: …() as the key equality predicate. X() X X a Requires: hasher and key_…
• Page 771: …() as the key equality predicate. constant X(i, j, n, hf, eq) X a(i,…
• Page 771: …eq as the key equality predicate, and inserts elements from [i, j) into…
• Page 772: …() as the key equality predicate, and inserts elements from [i, j) into…
• Page 772: …() as the key equality predicate, and inserts elements from [i, j) into…
• Page 772: …() as the key equality predicate, and inserts elements from [i, j) into…
• Page 773: …turns b’s key equality constant predicate. a_uniq. pair<iterator, boo…
• Page 833: …function, key equality function, and allocator, and using at least n buc…
• Page 833: …function, key equality func- tion, and allocator, and using at least n b…
• Page 838: …function, key equality function, and allocator, and using at least n buc…
• Page 838: …function, key equality function, and allocator, and using at least n buc…
• Page 842: …function, key equality function, and allocator, and using at least n buc…
• Page 842: …function, key equality func- tion, and allocator, and using at least n b…
• Page 846: …function, key equality function, and allocator, and using at least n buc…
• Page 846: …function, key equality function, and allocator, and using at least n buc…

"key equality predicate" seems more precise (it is a predicate and is not necessarily a function).