diff --git a/doc/src/sgml/filelist.sgml b/doc/src/sgml/filelist.sgml
index a5c5f12f10..23af846a67 100644
--- a/doc/src/sgml/filelist.sgml
+++ b/doc/src/sgml/filelist.sgml
@@ -1,4 +1,4 @@
-
+
@@ -78,7 +78,6 @@
-
diff --git a/doc/src/sgml/gin.sgml b/doc/src/sgml/gin.sgml
deleted file mode 100644
index 4420fcd0ab..0000000000
--- a/doc/src/sgml/gin.sgml
+++ /dev/null
@@ -1,135 +0,0 @@
-
-
-
-GIN Indexes
-
-
- index
- GIN
-
-
-
- Introduction
-
-
- GIN stands for Generalized Inverted Index. It is
- an index structure storing a set of (key, posting list) pairs, where
- 'posting list' is a set of documents in which the key occurs.
-
-
-
- It is generalized in the sense that a GIN index
- does not need to be aware of the operation that it accelerates.
- Instead, it uses custom strategies defined for particular data types.
-
-
-
- One advantage of GIN is that it allows the development
- of custom data types with the appropriate access methods, by
- an expert in the domain of the data type, rather than a database expert.
- This is much the same advantage as using GiST.
-
-
-
- The GIN
- implementation in PostgreSQL is primarily
- maintained by Teodor Sigaev and Oleg Bartunov, and there is more
- information on their
- website.
-
-
-
-
-
- Extensibility
-
-
- The GIN interface has a high level of abstraction,
- requiring the access method implementer to only implement the semantics of
- the data type being accessed. The GIN layer itself
- takes care of concurrency, logging and searching the tree structure.
-
-
-
- All it takes to get a GIN access method working
- is to implement four user-defined methods, which define the behavior of
- keys in the tree. In short, GIN combines extensibility
- along with generality, code reuse, and a clean interface.
-
-
-
-
-
- Implementation
-
-
- There are four methods that an index operator class for
- GIN must provide:
-
-
-
-
- compare
-
-
-
-
-
-
-
- extract value
-
-
-
-
-
-
-
- extract query
-
-
-
-
-
-
-
- consistent
-
-
-
-
-
-
-
-
-
-
-
- Examples
-
-
- The PostgreSQL source distribution includes
- GIN classes for one-dimensional arrays of all internal
- types. The following
- contrib modules also contain GIN
- operator classes:
-
-
-
-
- intarray
-
- Enhanced support for int4[]
-
-
-
-
- tsearch2
-
- Support for inverted text indexing. This is much faster for very
- large, mostly-static sets of documents.
-
-
-
-
-
diff --git a/doc/src/sgml/xindex.sgml b/doc/src/sgml/xindex.sgml
index 35e5137eae..c5c34087be 100644
--- a/doc/src/sgml/xindex.sgml
+++ b/doc/src/sgml/xindex.sgml
@@ -1,4 +1,4 @@
-
+
Interfacing Extensions To Indexes
@@ -380,41 +380,6 @@
-
- GIN indexes require four support functions,
- shown in .
-
-
-
- GIN Support Functions
-
-
-
- Function
- Support Number
-
-
-
-
- compare
- 1
-
-
- extract value
- 2
-
-
- extract query
- 3
-
-
- consistent
- 4
-
-
-
-
-
Unlike strategy operators, support functions return whichever data
type the particular index method expects; for example in the case