## add(part) {#customxmlpart} Adds an item to the collection. ```js add(part: Aspose.Words.Markup.CustomXmlPart) ``` | Parameter | Type | Description | | --- | --- | --- | | part | [CustomXmlPart](......// Add an XML schema association. xmlPart.schemas.add("http://www...through the collection and print the contents of each part. for...