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Gets or sets the output intent subtype.
According to the PDF specification the value may be GTS_PDFX, GTS_PDFA1, ISO_PDFE1 or a key defined by an ISO 32000 extension. GcPdf allows setting this property to any value, the user is responsible for the correctness of the data.
This value is "GTS_PDFA1" by default.public string Subtype { get; set; }
Public Property Subtype As String