Managing Custom Field Descriptors

SIL custom field descriptors are used to translate the custom field value into a valid SIL value.

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1. Default
   This descriptor determines the SIL representation of the custom field based on the type of its value.
2. Boolean -> boolean boolean
   Translates a boolean to its SIL internal representation.
3. Interval -> interval interval
   Translates an interval to its SIL internal representation. The custom field value can either be the user friendly string representation (1d 2h) or the number of seconds.
4. User[] -> string [] 
   Translates a collection of Users to a string array. The collection can also be represented as a single string with values separated by a pipe (|). The values represent the usernames.
   
5. Group -> string 
   Translates a group to a string value representing the group name.
6. Number[]-> number [] 
   Translates a collection of numbers to a number array. The collection can also be represented as a single string with values separated by a pipe (|).
7. Option-> string 
   Translates an option to a string value.
8. Number -> number 
   Translates a number to its SIL internal representation.
9. Boolean[]-> boolean[] 
   Translates to an array of boolean values. Custom field value can be a collection of boolean values or their string representation separated by a pipe (|).
10. Date[] -> date [] 
    Translates a collection of dates to a date array. The collection can also be represented as a single string with values separated by a pipe (|).
11. Date -> date 
    Translates a date value to its SIL internal representation.
12. User -> string 
    Translates a user to a string value representing the username.
13. Label[] -> string [] 
    Translates labels custom field to a string array containing the labels as strings.
14. String -> String 
    Translates to a string value.
15. Interval[] -> interval [] 
    Translates a collection of intervals to an interval array. The collection can also be represented as a single string with values separated by a pipe (|).
    The interval values can be represented either in a user-friendly string form (1d 2h) or in seconds.
16. Group[] -> string [] 
    Translates a collection of Groups to a string array.
    The collection can also be represented as a single string with values separated by a pipe (|).The values represent the group names.
17. Cascade -> string [] 
    Translates to an array of string values. First is key, second is value.
18. Collection(String) -> string []
    Translates a collection of string values to a string array.
    The collection can also be represented as a single string with values separated by a pipe (|).

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