st: Drop all that are listed in an external file

[miriam geringer <miriam.geringer@gmail.com>]

Hi Statalist,

I have the following dataset:

Identifier        Corresponding data
1                    X
2                    Z
3                    D
4
4
4
5
5
5
5
6
6
6
7
8

On the other hand, I have a *txt file, which includes only identifiers
that should be dropped from my dataset. A simple *txt including for
example:

Identifier
2
3
4

Now, I want Stata to access this *txt file and drop all the
observations in the dataset (based on the Identifier) that are in this
specific *txt file. I know that I could just copy it into Stata, but
since the list is very long I would prefer an "external" link to this
file.

After dropping, it should look like:

Identifier        Corresponding data
1                    X
5
5
5
5
6
6
6
7
8

Is something like this possible?

Something like:
drop if identifier exists using C:/*txt

Thanks!
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