/// <summary>
/// Adds a rule to the catalog directing the given public identifier to
/// the indicated URI.
/// </summary>
/// <param name="publicId">The public identifier to be mapped.</param>
/// <param name="uri">The corresponding URI.</param>
/// <param name="xmlbase">Optional <b>xml:base</b> value.</param>
/// <returns>The constructed <see cref="PublicEntry"/> instance.</returns>
public PublicEntry AddPublic(String publicId, String uri, String xmlbase)
{
PublicEntry result = new PublicEntry (this, publicId, uri, xmlbase);
rules.Add (result);
return (result);
}
