Specs: dartification of script.md

sky/specs/script.md

Index: sky/specs/script.md
diff --git a/sky/specs/script.md b/sky/specs/script.md
index 27b45ba7634589a18035e76da51dcbbbc615ab7d..d6033ff37311ec97718ca88a5dcebee987d0e978 100644
--- a/sky/specs/script.md
+++ b/sky/specs/script.md
@@ -1,12 +1,15 @@
 Sky Script Language
 ===================
 
-The Sky script language is JavaScript, with strict mode enabled.
+The Sky script language is based on Dart.
 
-The global object is as specified by the JavaScript specification,
-with the following changes:
+It has the following differences from Dart:
 
- - An additional property, with the "global", whose value is the
-   global object itself.
+- the 'library', 'part', 'import', 'export', and 'part of' directives
+  are not supported in sky (sky has its own module system)
 
-The getOwnPropertyKeys() method is removed.
+- ``<script>`` elements parse ``topLevelDefinition``s (there is no
+  ``libraryDefinition`` construct in the Sky Script Language).
+
+The way that Sky integrates the module system with its script language
+  is described in (modules.md)[modules.md].