xsd:string The Fastener is an artifact created to close a Container (e.g. coat, jar). Sometimes, the Container_portal rather than the Container is expressed. The door seal prevented air from getting in and the kids' screams from getting out. She has an antique ivory button at the front and another vintage button on her apron. NIST designed a high pressure seal for the extension sleeve using a series of metal washers to load the window under pressure.