InfoSum's Global Schema supports a set of standard keys.

This article lists (in alphabetical order) the standard keys that are defined in the Global Schema. Any keys that are not included can be added to your dataset as a custom key. The standard keys defined in the Global Schema are:

• Address
• Adform ID
• Adobe ID
• Amobee ID
• Beeswax ID
• BritePool ID
• Cookie ID
• CriteoID
• Email
• Epsilon CORE ID
• Experian LUID 
• Experian PID
• Fabrick ID by Neustar
• Google ID
• ID+ by Zeotap
• ID5
• Index ID
• IP Address (supporting IPv4 or IPv6 format)
• Kinesso ID
• LiveIntent nonID
• MediaMath ID
• Merkury ID by Merkle
• Mobile Advertising ID (AAID & IDFA)
• Name (Forename & Surname)
• NetID
• NextRoll ID
• OpenX ID
• Panorama ID by Lotame
• Parrable ID
• Permutive ID
• Phone number
• Pubmatic ID
• Quantcast ID
• RampID by LiveRamp
• Shared ID
• Social Media (there are more than 10 keys, including Twitter Handle & Facebook ID)
• Tapad ID
• The Trade Desk ID
• Throtle ID
• Transunion ID
• Unified ID 2.0
• Xandr ID