A PDF document is represented in HiQPdf library by the HiQPdfClientPdfDocument class. There are basically three methods of creating PDF documents in library:
Create empty PDF documents using the PdfDocument class constructor or the special static methods described in the Create Documents topic to create PDF documents with a given standard or a given color space
Use the HtmlToPdfConvertUrlToPdfDocument(String) and HtmlToPdfConvertHtmlToPdfDocument(String, String) methods of the HTML to PDF converter to create preconfigured PDF documents
Load existing PDF documents using the static methods of the PdfDocument class described in the Load Documents topic