+.SS EXTENDED STORAGE FORMAT
+The previous section describes the conventional terminfo binary format.
+With some minor variations of the offsets (see PORTABILITY),
+the same binary format is used in all modern UNIX systems.
+Each system uses a predefined set of boolean, number or string capabilities.
+.PP
+The ncurses libraries and applications support extended terminfo binary format,
+allowing users to define capabilities which are loaded at runtime. This
+extension is made possible by using the fact that the other implementations
+stop reading the terminfo data when they have reached the end of the size given
+in the header.
+ncurses checks the size, and if it exceeds that due to the predefined data,
+continues to parse according to its own scheme.
+.PP
+First, it reads the extended header (5 short integers):
+.RS 5
+.TP 5
+(1)
+count of extended boolean capabilities
+.TP 5
+(2)
+count of extended numeric capabilities
+.TP 5
+(3)
+count of extended string capabilities
+.TP 5
+(4)
+size of the extended string table in bytes.
+.TP 5
+(5)
+last offset of the extended string table in bytes.
+.RE