appending two dataset (variable label lost in the using dataset)

[Fredrick orwa]

dataset 1:
* Example generated by -dataex-. For more info, type help dataex
clear
input float(CCRmeta x x1)
677.3721 1 1
1173.0568 2 2
end
label values x1 df
label def df 1 "gr1", modify
label def df 2 "gr2", modify
[/CODE]

dataset 2:
* Example generated by -dataex-. For more info, type help dataex
clear
input float(CCRmeta x x1)
2831.791 7 7
2266.1501 8 8
end
label values x1 df
label def df 7 "gr1", modify
label def df 8 "gr2", modify
[/CODE]
------------

In the above two datasets the value label for 1 is gr1 and for 2 is gr2 in the first dataset.In the second dataset the value label is gr1 for 7 and gr2 for 8. I want to append the two datasets and still retain the value labels as they are.My problem is that if I append the two dataset is like value label for 7 and 8 (using dataset) is dropped. below is what I get from appending the two datasets.
* Example generated by -dataex-. For more info, type help dataex
clear
input float(CCRmeta x x1)
677.3721 1 1
1173.0568 2 2
2831.791 7 7
2266.1501 8 8
end
label values x1 df
label def df 1 "gr1", modify
label def df 2 "gr2", modify
[/CODE]

Kindly help

[Fredrick orwa]

Any help please

[daniel klein]

I want to append the two datasets and still retain the value labels as they are.

Why? Seriously, having different numeric values mapped to the same strings is a recipe for running into problems.