Doubts regarding space separated ASCII files

From: Prameela Nair <prameela_nair-at-persistent.co.in>
Date: Mon, 4 Dec 2006 11:10:05 +0530


We are trying to modify the implementation for VOConvert (http://vo.iucaa.ernet.in/~voi/VOConvert.htm) which is a tool to convert ASCII/FITS file(s) to the VOTable format.  

Some queries regarding space separated ASCII files -  

  1. How are null values represented? Do we add an additional space to represent a null value for the column?
  2. Are there space separated ASCII files where the number of spaces that separate two values/columns is greater than 1?

   e.g. - here values for columns are separated by 2 spaces

   12 345 67 2345

   1235 234 1 265        

For the fixed format files -

  1. Do null values exist in fixed format files? If yes, how are they represented?

Thanks & Regards,

Prameela Nair,

VO-India,

Persistent Systems Pvt. Ltd.(www.persistentsys.com).    

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