Make the default values of character properties name, old-name, and iso-10646-comment to nil.

admin/ChangeLog

@@ -1,3 +1,9 @@
+2012-02-16  Kenichi Handa  <handa@m17n.org>
+
+	* unidata/unidata-gen.el (unidata-prop-alist): Change the default
+	values of name and old-name to nil.
+	(unidata-get-name): Return nil for the default value.
+
 2012-02-11  Glenn Morris  <rgm@gnu.org>
 
 	* admin.el (cusver-find-files, cusver-scan, cusver-goto-xref)

admin/unidata/unidata-gen.el

@@ -166,9 +166,10 @@
   '((name
      1 unidata-gen-table-name "uni-name.el"
      "Unicode character name.
-Property value is a string."
+Property value is a string or nil.
+The value nil stands for the default value \"null string\")."
      nil
-     "")
+     nil)
     (general-category
      2 unidata-gen-table-symbol "uni-category.el"
      "Unicode general category.
@@ -235,7 +236,8 @@ Property value is a symbol `Y' or `N'.  See also the property `mirroring'."
     (old-name
      10 unidata-gen-table-name "uni-old-name.el"
      "Unicode old names as published in Unicode 1.0.
-Property value is a string.")
+Property value is a string or nil.
+The value nil stands for the default value \"null string\").")
     (iso-10646-comment
      11 unidata-gen-table-name "uni-comment.el"
      "Unicode ISO 10646 comment.
@@ -712,7 +714,7 @@ is the character itself.")))
 	    (aset table c name)
 	    (if (= c char)
 		(setq val name))))
-	(or val ""))))
+	val)))
 
    ((and (integerp val) (> val 0))
     (let* ((symbol-table (aref (char-table-extra-slot table 4) 1))
@@ -738,9 +740,7 @@ is the character itself.")))
 	    ((eq sym 'CJK\ COMPATIBILITY\ IDEOGRAPH)
 	     (format "%s-%04X" sym char))
 	    ((eq sym 'VARIATION\ SELECTOR)
-	     (format "%s-%d" sym (+ (- char #xe0100) 17))))))
-
-   (t "")))
+	     (format "%s-%d" sym (+ (- char #xe0100) 17))))))))
 
 ;; Store VAL as the name of CHAR in TABLE.
 

lisp/ChangeLog

@@ -1,3 +1,10 @@
+2012-02-16  Kenichi Handa  <handa@m17n.org>
+
+	* international/charprop.el:
+	* international/uni-name.el:
+	* international/uni-old-name.el:
+	* international/uni-comment.el: Regenerate.
+
 2012-02-14  Glenn Morris  <rgm@gnu.org>
 
 	* mail/smtpmail.el (smtpmail-query-smtp-server): Give it a doc.

lisp/international/charprop.el

@@ -2,7 +2,8 @@
 ;; FILE: uni-name.el
 (define-char-code-property 'name "uni-name.el"
   "Unicode character name.
-Property value is a string.")
+Property value is a string or nil.
+The value nil stands for the default value \"null string\").")
 ;; FILE: uni-category.el
 (define-char-code-property 'general-category "uni-category.el"
   "Unicode general category.
@@ -48,7 +49,8 @@ Property value is a symbol `Y' or `N'.  See also the property `mirroring'.")
 ;; FILE: uni-old-name.el
 (define-char-code-property 'old-name "uni-old-name.el"
   "Unicode old names as published in Unicode 1.0.
-Property value is a string.")
+Property value is a string or nil.
+The value nil stands for the default value \"null string\").")
 ;; FILE: uni-comment.el
 (define-char-code-property 'iso-10646-comment "uni-comment.el"
   "Unicode ISO 10646 comment.