Code change:
This was inspired by the comment by afrind at URL For each representation, uniformly use the word "representation" in the first sentence; use the word "identifies" if it's a verbatim entry; "encodes" otherwise; identify relative versus post-base indexing in the first sentence; move drawing right after first sentence; use consistent language describing binary format.

Related discussion:
text: 4.5.2. <del> An indexed header field representation identifies an entry in either the static table or the dynamic table and causes that header field to be added to the decoded header list. If the entry is in the static table, or in the dynamic table with an absolute index less than the Base, this representation starts with the '1' 1-bit pattern, followed by the 'T' bit indicating whether the reference is into the static or dynamic table.  The 6-bit prefix integer (see prefixed-integers) that follows is used to locate the table entry for the header field.  When T=1, the number represents the static table index; when T=0, the number is the relative index of the entry in the dynamic table. </del> <ins> An indexed header field representation identifies an entry in the static table, or an entry in the dynamic table with an absolute index less than the Base. This representation starts with the '1' 1-bit pattern, followed by the 'T' bit indicating whether the reference is into the static or dynamic table.  The 6-bit prefix integer (see prefixed-integers) that follows is used to locate the table entry for the header field.  When T=1, the number represents the static table index; when T=0, the number is the relative index of the entry in the dynamic table. </ins> 4.5.3. <del> If the entry is in the dynamic table with an absolute index greater than or equal to the Base, the representation starts with the '0001' 4-bit pattern, followed by the post-base index (see post-base) of the matching header field, represented as an integer with a 4-bit prefix (see prefixed-integers). </del> <ins> An indexed header field with post-base index representation identifies an entry in the dynamic table with an absolute index greater than or equal to the Base. </ins> <del> 4.5.4. </del> <ins> This representation starts with the '0001' 4-bit pattern.  This is followed by the post-base index (see post-base) of the matching header field, represented as an integer with a 4-bit prefix (see prefixed-integers). </ins> <del> A literal header field with name reference represents a header field where the header field name matches the header field name of an entry stored in the static table or the dynamic table. If the entry is in the static table, or in the dynamic table with an absolute index less than the Base, this representation starts with the '01' two-bit pattern. </del> <ins> 4.5.4. </ins> <del> The following bit, 'N', indicates whether an intermediary is permitted to add this header to the dynamic header table on subsequent hops.  When the 'N' bit is set, the encoded header MUST always be encoded with a literal representation.  In particular, when a peer sends a header field that it received represented as a literal header field with the 'N' bit set, it MUST use a literal representation to forward this header field.  This bit is intended for protecting header field values that are not to be put at risk by compressing them (see security-considerations for more details). </del> <ins> A literal header field with name reference representation encodes a header field where the header field name matches the header field name of an entry in the static table, or the header field name of an entry in the dynamic table with an absolute index less than the Base. This representation starts with the '01' two-bit pattern.  The following bit, 'N', indicates whether an intermediary is permitted to add this header to the dynamic header table on subsequent hops.  When the 'N' bit is set, the encoded header MUST always be encoded with a literal representation.  In particular, when a peer sends a header field that it received represented as a literal header field with the 'N' bit set, it MUST use a literal representation to forward this header field.  This bit is intended for protecting header field values that are not to be put at risk by compressing them (see security-considerations for more details). </ins> The fourth ('T') bit indicates whether the reference is to the static or dynamic table.  The 4-bit prefix integer (see prefixed-integers)