ScriptManager в Aspx

В примере приложения aspx на главной странице у меня есть:

<asp:ScriptManager runat = "server">
            <Scripts>
                <%--To learn more about bundling scripts in ScriptManager see https://go.microsoft.com/fwlink/?LinkID=301884 --%>
                <%--Framework Scripts--%>
                <asp:ScriptReference Name = "MsAjaxBundle" />
                <asp:ScriptReference Name = "jquery" />
                <asp:ScriptReference Name = "bootstrap" />
                <asp:ScriptReference Name = "WebForms.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/WebForms.js" />
                <asp:ScriptReference Name = "WebUIValidation.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/WebUIValidation.js" />
                <asp:ScriptReference Name = "MenuStandards.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/MenuStandards.js" />
                <asp:ScriptReference Name = "GridView.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/GridView.js" />
                <asp:ScriptReference Name = "DetailsView.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/DetailsView.js" />
                <asp:ScriptReference Name = "TreeView.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/TreeView.js" />
                <asp:ScriptReference Name = "WebParts.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/WebParts.js" />
                <asp:ScriptReference Name = "Focus.js" Assembly = "System.Web" Path = "~/Scripts/WebForms/Focus.js" />
                <asp:ScriptReference Name = "WebFormsBundle" />
                <%--Site Scripts--%>
            </Scripts>
        </asp:ScriptManager>

Теперь у меня вопрос: почему первые три скрипта объявлены иначе, чем другие, и как asp net разрешает их исходный путь. Спасибо за любой ответ