S99: entries related to Unicode, whitespace, comments

S99-glossary.pod

@@ -279,6 +279,15 @@ or IR clogs, depending on how you interpret the domain name.
 
 Common Language Runtime, as used by Niecza/mono/.NET.
 
+=head2 comment
+
+Parts of a program intend for user consumption that are not used to generate code.
+Beside the C<#> that starts a comment that ends with the current line
+Perl 6 supports many syntactic forms for different kinds of comments.
+Like inline comments that can be used as L</whitespace>, or comments
+that appear after a name declaration that are included in the </pod>
+documentation.
+
 =head2 compilation unit
 
 A L</compilation unit> is a set of files or a string that is compiled at once.
@@ -926,7 +935,7 @@ regex engine.  See: L<https://en.wikipedia.org/wiki/Nondeterministic_finite_auto
 
 =head2 NFG
 
-Proposed Unicode normilization form for Perl6, in which composed
+Proposed L</Unicode normalization form> for Perl6, in which composed
 characters always get their own codepoint. If a codepoint doesn't exist
 for that composed character, one is assigned dynamically.
 
@@ -1559,6 +1568,18 @@ See L<http://perlcabal.org/syn/S02.html#Twigils>.
 
 =head1 U
 
+=head2 UAX
+
+Unicode Standard Annex.
+Unicode standard material that is not part of the core.
+Some are specific to some languages while other are generic,
+like L<UAX 15|http://www.unicode.org/reports/tr15/> that covers
+L</Unicode Normalization Form>s.
+
+=head2 UCD
+
+See L</Unicode Character Database>
+
 =head2 unboxing
 
 See L</boxing>.
@@ -1578,8 +1599,22 @@ L</prefix>, L</postfix>, L</circumfix> are unary.
 
 =head2 Unicode
 
-L<Unicode glossary|http://www.unicode.org/glossary/>.
-See also: L</NFG>.
+Unicode is a standard defining the encodings, representation and handling of text in most writing systems.
+This standard includes a useful L<Unicode glossary|http://www.unicode.org/glossary/>.
+For Perl 6 handling of Unicode, see the 
+L<documentation|https://raw.githubusercontent.com/perl6/specs/master/S15-unicode.pod>
+See also L</NFG> for an encoding specific to Perl 6.
+
+=head2 Unicode Data Base
+
+It consists of a number of data files listing Unicode character properties and related data.
+It also includes data files containing test data for conformance to several important Unicode algorithms.
+See L<also|http://www.unicode.org/ucd/>. For a given character, many of these properties can
+
+=head2 Unicode Normalization Form
+
+See </UAX> <15|http://unicode.org/reports/tr15/>.
+Perl 6 defines an addtional one : L</NFG>.
 
 =head2 unit
 
@@ -1656,6 +1691,9 @@ L<http://doc.perl6.org/type/Whatever>.
 
 =head2 whitespace
 
+Any Perl 6 L</token>s may or must be separated by tokens.
+L</comment>s are Whitespaces .
+
 =head2 WIP
 
 Work In Progress.