v3.0 is about 15 years old so we don't have anything that imports it directly. That being said, the documentation in v4.0 related to conversion of v3.0 Dynamic Language XML Definitions reads:
- The LanguageDefinitionVersion attribute of the root SyntaxLanguage tag in a dynamic language XML definition should now have a value of 4.0.
- The xmlns attribute should be http://ActiproSoftware/SyntaxEditor/4.0/LanguageDefinition.
- The Underline attribute of the Style tag should be renamed to UnderlineStyle
and it has some different values. For instance, Solid should now be used instead of True.
If you do those things to port your XML from v3.0 to v4.0, you should have a v4.0 XML file that can be imported into the Language Designer.