The key conventions of an opening title sequence

These are the key conventions that I would expect to find in an opening title sequence:

• Distributor company's name
• Production company's name
• The name of the director
• Producers name
• Executive producers name
• The films's title
• Main cast list (usually the main actor/actresses name would appear before anyone else's)
• Credit to the creator if the film is based upon somebody else's work such as an author or playwright
• Editors name
• Writers
• Credits for the people who made the film score and/or to the people who made a song specifically to be part of the film, such as "Skyfall" by Adele in the film 'Skyfall'. 
• A logo to go with the film
• List of those people who were part of the production company such as special effects and costume designers (these credits would usually be expected to be found at the end credits to a film)

Although not all of these credits will be found in every film opening title sequence or in this particular order, this list serves the purpose of showing what I have found during an OTS of the many films I have seen.

A film might have it's opening title sequence straight at the beginning of a film, or instead it might take place at a later point (usually after an initial scene.) 

Here is an example of a film's opening title sequence which also takes place after an important part to the films story: