Accessibility and exploitation of "published" extragalactic data:  public and private efforts



1) History and Motivation 
 

2) Evolution of the various existing catalog collections 
 

3) Recovering older catalogs via OCR 
 

4) Current statistics of catalog archives (CDS,CATS,HA)
 

5) Problems with accessibility of recent electronic tables
 

6) Problems with nomenclature of celestial objects
 

7) The Complementary Nature of Databases and Catalog Browsers 
 

8) Example of an exploitation of electronic tabular data:
       ACO cluster redshift compilation "ZACO"