ie. You can own the surface rights, but you sell the timber rights to farmer John for 25 years. The nature of the status of the land is fixed by law, and are distinguished as being either a freehold estate or a non-freehold estate. Freehold means ownership without limitations to duration.
The acronym PDF stands for 'Portable Document Format'. This long form of the acronym still doesn't tell you a lot, but it can give you a rough idea of what we are talking about. One thing that you can grasp easily is that it's a 'Document Format'.
1 A PDF is a universal file format that preserves/embeds the fonts, images, layout and graphics of any source document, regardless of the application used to create it. 2  PDF files can be shared, viewed and printed by anyone with the free Adobe Reader software.