The $SPFields context item is used to interact with SharePoint Lookup, User, URL, Multi-Choice, Multi-Column, and Rating Scale field data. 

$SPUtility Operations

Operation	Description
GetDistinctFieldValues	Method used to get a list of distinct field values in a list. Parameters SPList : list string : internalFieldName Output System.String[]
GetLookupValue	Method used to get a multi-column field value. Parameters string : fieldValue Output Microsoft.SharePoint.SPFieldLookupValue
GetLookupValueCollection	Method used to get a lookup collection field value. Parameters string : fieldValue Output Microsoft.SharePoint.SPFieldLookupValueCollection
GetUrlValue	Method used to get a URL field value. Parameters string : fieldValue Output Microsoft.SharePoint.SPFieldUrlValue
GetUserValue	Method used to get a user field value. Parameters Microsoft.SharePoint.SPWeb : web string : fieldValue Output Microsoft.SharePoint.SPFieldUserValue
GetUserValueCollection	Method used to get a multi-user field value. Parameters Microsoft.SharePoint.SPWeb : web string : fieldValue Output Microsoft.SharePoint.SPFieldUserValueCollection
GetMultiChoiceValue	Method used to get a multi-choice field value. Parameters string : fieldValue Output Microsoft.SharePoint.SPFieldMultiChoiceValue
GetRatingScaleValue	Method used to get a rating scale field value. Parameters string : fieldValue Output Microsoft.SharePoint.SPFieldRatingScaleValue
GetMultiColumnValue	Method used to get a multi-column field value. Parameters string : fieldValue Output Microsoft.SharePoint.SPFieldMultiColumnValue

View the Read Complex Field Data page for sample usage.