Database.com Metadata API Developer's Guide - Salesforce.com

Metadata TypesCustomFieldField NamecaseSensitivedefaultValuedeleteConstraintdeprecateddescriptiondisplayFormatdisplayLocationInDecimalexternalIdformulaformulaTreatBlankAsfullNameindexedinlineHelpTextField TypebooleanstringDeleteConstraint(enumeration of typestring)booleanstringstringbooleanbooleanstringTreatBlanksAs(enumeration of typestring)stringbooleanstringDescriptionIndicates whether the field is case sensitive (true) or not(false).If specified, represents the default value of the field.Provides deletion options for lookup relationships. Validvalues are:SetNullThis is the default. If the lookup record is deleted,the lookup field is cleared.RestrictPrevents the record from being deleted if it’s in alookup relationship.CascadeDeletes the lookup record as well as associated lookupfields.For more information on lookup relationships, see“Overview of Object Relationships” in the Database.comHelp.Reserved for future use.Description of the field.The display format.Indicates how the value of a Geolocation custom fieldappears in the user interface. If true, the geolocationappears in decimal notation. If false, the geolocationappears as degrees, minutes, and seconds.Indicates whether the field is an external ID field (true)or not (false).If specified, represents a formula on the field.Indicates how to treat blanks in a formula. Valid values areBlankAsBlank and BlankAsZero.Inherited from Metadata, this field is not defined in theWSDL for this metadata type. It must be specified whencreating, updating, or deleting. See create() to see anexample of this field specified for a call.This value cannot be null.Indicates if the field is indexed. If this field is unique orthe externalId is set true, the isIndexed value is setto true. This field has been deprecated as of version 14.0and is only provided for backward compatibility.Represents the content of field-level help. For moreinformation, see “Defining Field-Level Help” in theDatabase.com Help.88