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-rwxr-xr-xdoc/ref/api-data.texi19
1 files changed, 16 insertions, 3 deletions
diff --git a/doc/ref/api-data.texi b/doc/ref/api-data.texi
index 5cbf4b17b..cf0d32113 100755
--- a/doc/ref/api-data.texi
+++ b/doc/ref/api-data.texi
@@ -2690,6 +2690,14 @@ Vertical tab character (ASCII 11).
@item @nicode{\xHH}
Character code given by two hexadecimal digits. For example
@nicode{\x7f} for an ASCII DEL (127).
+
+@item @nicode{\uHHHH}
+Character code given by four hexadecimal digits. For example
+@nicode{\u0100} for a capital A with macron (U+0100).
+
+@item @nicode{\UHHHHHH}
+Character code given by six hexadecimal digits. For example
+@nicode{\U010402}.
@end table
@noindent
@@ -3110,9 +3118,14 @@ The procedures in this section are similar to the character ordering
predicates (@pxref{Characters}), but are defined on character sequences.
The first set is specified in R5RS and has names that end in @code{?}.
-The second set is specified in SRFI-13 and the names have no ending
-@code{?}. The predicates ending in @code{-ci} ignore the character case
-when comparing strings. @xref{Text Collation, the @code{(ice-9
+The second set is specified in SRFI-13 and the names have not ending
+@code{?}.
+
+The predicates ending in @code{-ci} ignore the character case
+when comparing strings. For now, case-insensitive comparison is done
+using the R5RS rules, where every lower-case character that has a
+single character upper-case form is converted to uppercase before
+comparison. See @xref{Text Collation, the @code{(ice-9
i18n)} module}, for locale-dependent string comparison.
@rnindex string=?