/// <summary>
/// Creates new document instance
/// </summary>
public Document()
{
_metadata = new Metadata();
_manifest = new Manifest();
_spine = new Spine();
_guide = new Guide();
_ncx = new NCX();
_container = new Container();
_ids = new Dictionary<string, int>();
// setup mandatory TOC file
_manifest.AddItem("ncx", "toc.ncx", "application/x-dtbncx+xml");
_spine.SetToc("ncx");
_container.AddRootFile("OPF/content.opf", "application/oebps-package+xml");
Guid guid = Guid.NewGuid();
string uuid = "urn:uuid:" + guid.ToString();
_ncx.SetUid(uuid);
_metadata.AddBookIdentifier("BookId", uuid);
}