aspose.Words.saving.HtmlSaveOptions class. Can be used to specify additional options when saving a document into the [SaveFormat.HTML](../../aspose.Words/saveformat/#HTML), [SaveFormat.MHTML](../../aspose.Words/saveformat/#MHTML), [SaveFormat.EPUB](../../aspose.Words/saveformat/#EPUB), [SaveFormat.AZW3](../../aspose.Words/saveformat/#AZW3) or [SaveFormat.MOBI](../../aspose.Words/saveformat/#MOBI) format... Default value is an empty string and generated CSS class...exported to HTML. Default is an empty string. css_style_sheet_type...