ResolveXmlNamespace() private method

private ResolveXmlNamespace ( String prefix ) : String
prefix String
return String
        private void AddScript(Compiler compiler)
        {
            NavigatorInput input = compiler.Input;

            ScriptingLanguage lang = ScriptingLanguage.JScript;
            string            implementsNamespace = null;

            if (input.MoveToFirstAttribute())
            {
                do
                {
                    if (input.LocalName == input.Atoms.Language)
                    {
                        string langName = input.Value;
                        if (
                            String.Compare(langName, "jscript", StringComparison.OrdinalIgnoreCase) == 0 ||
                            String.Compare(langName, "javascript", StringComparison.OrdinalIgnoreCase) == 0
                            )
                        {
                            lang = ScriptingLanguage.JScript;
                        }
                        else if (
                            String.Compare(langName, "c#", StringComparison.OrdinalIgnoreCase) == 0 ||
                            String.Compare(langName, "csharp", StringComparison.OrdinalIgnoreCase) == 0
                            )
                        {
                            lang = ScriptingLanguage.CSharp;
                        }
                        else
                        {
                            throw XsltException.Create(Res.Xslt_ScriptInvalidLanguage, langName);
                        }
                    }
                    else if (input.LocalName == input.Atoms.ImplementsPrefix)
                    {
                        if (!PrefixQName.ValidatePrefix(input.Value))
                        {
                            throw XsltException.Create(Res.Xslt_InvalidAttrValue, input.LocalName, input.Value);
                        }
                        implementsNamespace = compiler.ResolveXmlNamespace(input.Value);
                    }
                }while (input.MoveToNextAttribute());
                input.ToParent();
            }
            if (implementsNamespace == null)
            {
                throw XsltException.Create(Res.Xslt_MissingAttribute, input.Atoms.ImplementsPrefix);
            }
            if (!input.Recurse() || input.NodeType != XPathNodeType.Text)
            {
                throw XsltException.Create(Res.Xslt_ScriptEmpty);
            }
            compiler.AddScript(input.Value, lang, implementsNamespace, input.BaseURI, input.LineNumber);
            input.ToParent();
        }
        private void AddScript(Compiler compiler) {
            NavigatorInput input = compiler.Input;

            ScriptingLanguage lang = ScriptingLanguage.JScript;
            string implementsNamespace = null;
            if (input.MoveToFirstAttribute()) {
                do {
                    if (input.LocalName == input.Atoms.Language) {
                        string langName = input.Value;
                        if (
                            String.Compare(langName, "jscript"   , StringComparison.OrdinalIgnoreCase) == 0 ||
                            String.Compare(langName, "javascript", StringComparison.OrdinalIgnoreCase) == 0
                        ) {
                            lang = ScriptingLanguage.JScript;
                        } else if (
                            String.Compare(langName, "c#"    , StringComparison.OrdinalIgnoreCase) == 0 ||
                            String.Compare(langName, "csharp", StringComparison.OrdinalIgnoreCase) == 0
                        ) {
                            lang = ScriptingLanguage.CSharp;
                        }
#if !FEATURE_PAL // visualbasic
                        else if (
                            String.Compare(langName, "vb"         , StringComparison.OrdinalIgnoreCase) == 0 ||
                            String.Compare(langName, "visualbasic", StringComparison.OrdinalIgnoreCase) == 0
                        ) {
                            lang = ScriptingLanguage.VisualBasic;
                        }
#endif // !FEATURE_PAL
                        else {
                            throw XsltException.Create(Res.Xslt_ScriptInvalidLanguage, langName);
                        }
                    }
                    else if (input.LocalName == input.Atoms.ImplementsPrefix) {
                        if(! PrefixQName.ValidatePrefix(input.Value))  {
                            throw XsltException.Create(Res.Xslt_InvalidAttrValue, input.LocalName, input.Value);
                        }
                        implementsNamespace = compiler.ResolveXmlNamespace(input.Value);
                    }
                }
                while (input.MoveToNextAttribute());
                input.ToParent();
            }
            if (implementsNamespace == null) {
                throw XsltException.Create(Res.Xslt_MissingAttribute, input.Atoms.ImplementsPrefix);
            }
            if (!input.Recurse() || input.NodeType != XPathNodeType.Text) {
                throw XsltException.Create(Res.Xslt_ScriptEmpty);
            }
            compiler.AddScript(input.Value, lang, implementsNamespace, input.BaseURI, input.LineNumber);
            input.ToParent();
        }