The technology lef file describes the design rules of the particular technology. The library lef file specifies how the different standard cells in the library are fabricated in accordance with the design rules. This explains the geometry of the different cells specified. RECT is used for defining the geometry of the pins in the cells which represents a rectangle formed by the specified metal layer.
Does the library LEF also describe the metal layers of the cell? does it also describe the different metal layers and their positions in the cell? Does it also describe nmos and pmos area of the cell?
What is the typical file name extension of a technology lef? is it .tf or .lef? Will not there be a common technology lef file for all the cells in a library lef file corresponding to a technology?
What does RECT 0.23 0.33 0.29 0.44 means?