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Get access to main document parts
To get access to an internal package of an OpenXML document you need to use TElOfficeOpenXMLDocument.Package property, which returns an instance of TElOfficePackage class.
Additionally, you may get access to the common parts of the OpenXML document using OfficeDocumentPart and ThumbnailPart properties of the document, which contain references to instances of TElOfficePackagePart class. Also using TElOfficeOpenXMLDocument.CoreProperties property you can get access to the core document properties, such as Creator, Title, Version, LastModifiedBy and so on.
