The SIMBAD astronomical database provides basic data, cross-identifications, bibliography and measurements for astronomical objects outside the solar system.
Simbad is a meta-compilation built from what is published in the literature, and from our expertise on cross-identifications. By construction it is highly inhomogeneous as data come from any kind of instruments at all wavelenghts with any resolution and astrometry, and different names from one publication to another.
The SIMBAD data base presently contains information for about 13,000,000 astronomical objects (stars, galaxies, planetary nebulae, clusters, novae and supernovae, etc.).
Only references from SIMBAD can be retrieved by this way. For more complete bibliographic searches, please visit ADS. With a complete bibcode, you can also get the list of astronomical objects contained in the paper, and referenced in SIMBAD (check the box ' display objects in the reference ') after the bibcode field.
If you used Simbad urls in your applications and parsed the HTML output to extract your information, you will have to adapt your parsing. But we encourage you to use directly the script output, easier to parse, and stable or the TAP service. If you are writing a program, the documentation gives suggestion to query SIMBAD by URLs.