diff --git a/doc/src/sgml/json.sgml b/doc/src/sgml/json.sgml
new file mode 100644
index 6642618..d55a08f
*** a/doc/src/sgml/json.sgml
--- b/doc/src/sgml/json.sgml
*************** SELECT jdoc->'guid', jdoc->'name'
*** 460,470 ****
      and a <literal>jsonb_path_ops</literal> GIN index is that the former
      creates independent index items for each key and value in the data,
      while the latter creates index items only for each value in the
!     data.<footnote><para>For this purpose, the term <quote>value</>
!     includes array elements, though JSON terminology sometimes considers
!     array elements distinct from values within objects.</para></footnote>
!     But in <literal>jsonb_path_ops</literal>, each index item is a hash
!     of both the value and the key(s) leading to it; for example to index
      <literal>{"foo": {"bar": "baz"}}</literal>, a single index item would
      be created incorporating all three of <literal>foo</>, <literal>bar</>,
      and <literal>baz</> into the hash value.  Thus a containment query
--- 460,475 ----
      and a <literal>jsonb_path_ops</literal> GIN index is that the former
      creates independent index items for each key and value in the data,
      while the latter creates index items only for each value in the
!     data.  
!     <footnote>
!      <para>
!       For this purpose, the term <quote>value</> includes array elements,
!       though JSON terminology sometimes considers array elements distinct
!       from values within objects.
!      </para>
!     </footnote>
!     Basically, each <literal>jsonb_path_ops</literal> index item is
!     a hash of the value and the key(s) leading to it; for example to index
      <literal>{"foo": {"bar": "baz"}}</literal>, a single index item would
      be created incorporating all three of <literal>foo</>, <literal>bar</>,
      and <literal>baz</> into the hash value.  Thus a containment query