如何才能最好地创建仅显示根文件夹内容的SharePoint列表视图？

I have a custom SharePoint list definition that is based on the Document content type. My library instance that I create from this contains many HTML documents, and each of those documents has some images saved into a subfolder inside this library. What's the best way to create a view that will show all of those top-level HTML documents without showing all of the image accessory files? I'd prefer to define this within the schema.xml file for my list definition.I have a custom SharePoint list definition that