[moved] how to use library ieee_proposed file

[sangeethap]

i have some error while using Library ieee_proposed file in my project.i used modelsim altera se 6.5e software.your help gratefully clear my error.thank you.
** Error: C:/altera/10.0/fixed pt.vhd(1): Library ieee_proposed not found.
** Error: C:/altera/10.0/fixed pt.vhd(2): (vcom-1136) Unknown identifier "ieee_proposed".
** Error: C:/altera/10.0/fixed pt.vhd(4): VHDL Compiler exiting