Adding/merging cursors

[jda]

>Hi, Jon --
>
>On Nov 18, 2004, at 14:15, jda wrote:
>
>>in V2 what would be the best way of merging records in two cursors 
>>(e.g. AND or OR). As I recall you can't take two existing cursors 
>>and AND or OR them, but you mentioned a long time ago thatin V2 
>>there would be another, easy way to do this.
>>
>>What I'm thinking of is taking two cursors, each of which has all 
>>the publications by one author, and ANDing them to see on which 
>>works they were co-authors (or ORing them to see the total number 
>>of works on which either was an author).
>
>I'm not sure about cursors, but have you looked at the wealth of 
>methods available with VSets?  Given two sets, you can get 
>differences, intersections, unions, etc.
>
>-- Erik
>

Hi Erik,

I haven't looked at VSets yet -- there is very little documentation 
on these, so I really don't know what they are for and how best to 
use them. If there is a way of getting cursors -> VSets -> cursors, 
or something else that VSets can do, that might be an answer...

Jon