Mike, Steve

The proposal to allow padding to minimum length on output consists of

new property ouputMinLength
Separate pad properties for string, number and calendar types
new textxxxxPad property to control padding . Moved from from textxxxxxxJustification

1 Padding

Property Name Description
outputMinLength String.
Only used when textStringPad, textNumberPad or textCalendarPad is ’minlength’.
Specifies the minimum output length of this element using either a fixed number or an expression to refer to an element earlier in the data,.
Annotation: dfdl:element (all simple types)

1.1 Properties Specific to Strings with Text representation

Property Name Description
textStringPad Enum
Valid values ‘none’, ‘fixed’, ‘minLength’
Controls how an item is justified on output when the actual length of a text string is different from the specified length.
Controls how an item is trimmed on input if textTrimKind is padChar
If ‘none’ the string is expected to match the length.
Otherwise:
- If lengthKind results in a fixed length: If shorter than the specified length it is padded with the pad character. If longer than the specified length it is truncated.
- If lengthKind is ‘prefixed’: If the string is longer than any specified maximum length it is truncated.
textStringJustification Enum
Valid values ‘left’, ‘right’, ‘center’
‘center’ adds equal padChars before and after the string contents if the string is too short. It adds one extra padChar before if needed.
‘center’ truncates equal numbers of characters before and after if the string is too long. It removes one extra character at the front of the string if needed.
[OMG/CAM property justification]
Annotation: dfdl:element (simple type ‘string’)
textStringPadCharacter String.
The padding character used as the default for justification of text elements.
In fixed width character sets this must contain a full single character representation. So if hex entities are used, enough hex bytes must be supplied to provided the full width of a character.
In variable width character sets, this character must be a minimum-width character unless it is specified as an entity (see section TBD Entities)
Annotation: dfdl:element (simple type ‘string’)

1.2 Properties Specific to Number with Text representation

Property Name Description
textNumberPad Enum
Valid values ‘none’, ‘fixed’, ‘minLength’
Controls how an item is justified on output when the actual length of a text string is different from the specified length.
Controls how an item is trimmed on input if textTrimKind is padChar
If ‘none’ the string is expected to match the length.
Otherwise:
- If lengthKind results in a fixed length: If shorter than the specified length it is padded with the pad character. If longer than the specified length it is truncated.
- If lengthKind is ‘prefixed’: If the string is longer than any specified maximum length it is truncated.
textNumberJustification Enum
Valid values ‘left’, ‘right’, ‘center’
‘center’ adds equal padChars before and after the string contents if the string is too short. It adds one extra padChar before if needed.
‘center’ truncates equal numbers of characters before and after if the string is too long. It removes one extra character at the front of the string if needed.
[OMG/CAM property justification]
Annotation: dfdl:element (simple type ‘string’)
textNumberPadCharacter String.
The padding character used as the default for justification of text elements.
In fixed width character sets this must contain a full single character representation. So if hex entities are used, enough hex bytes must be supplied to provided the full width of a character.
In variable width character sets, this character must be a minimum-width character unless it is specified as an entity (see section TBD Entities)
Annotation: dfdl:element (simple type ‘string’)

1.3 Properties Specific to Calendar with Text representation

Property Name Description
textCalendarPad Enum
Valid values ‘none’, ‘fixed’, ‘minLength’
Controls how an item is justified on output when the actual length of a text string is different from the specified length.
Controls how an item is trimmed on input if textTrimKind is padChar
If ‘none’ the string is expected to match the length.
Otherwise:
- If lengthKind results in a fixed length: If shorter than the specified length it is padded with the pad character. If longer than the specified length it is truncated.
- If lengthKind is ‘prefixed’: If the string is longer than any specified maximum length it is truncated.
textCalendarJustification Enum
Valid values ‘left’, ‘right’, ‘center’
‘center’ adds equal padChars before and after the string contents if the string is too short. It adds one extra padChar before if needed.
‘center’ truncates equal numbers of characters before and after if the string is too long. It removes one extra character at the front of the string if needed.
[OMG/CAM property justification]
Annotation: dfdl:element (simple type ‘string’)
textCalendarPadCharacter String.
The padding character used as the default for justification of text elements.
In fixed width character sets this must contain a full single character representation. So if hex entities are used, enough hex bytes must be supplied to provided the full width of a character.
In variable width character sets, this character must be a minimum-width character unless it is specified as an entity (see section TBD Entities)
Annotation: dfdl:element (simple type ‘string’)

I also completed the table of meaning of implicit lengths for different types

1.1 Lengths of simple types for lengthKind=implicit

Implemented in WMB GUI helper function

Simple type text (+ xml) binary
String Length/maxlength n/a
Float Text: numberPattern
(length of positive subpattern)
Zoned: TotalDigits
32
Double Text: numberPattern
Zoned: TotalDigits
64
Decimal/Integer Text: numberPattern
Zoned: TotalDigits
Pkd/bcd: TotalDigits+1/2
Long, UnsignedLong Text: numberPattern
Zoned: 19
binary: 64
Pkd/bcd: TotalDigits+1/2

Int, Unsignedint Text: numberPattern
Zoned: 10
binary: 32
Pkd/bcd: TotalDigits+1/2

Short, Unsignedshort Text: numberPattern
Zoned: 5
binary: 16
Pkd/bcd: TotalDigits+1/2

Byte, Unsignedbyte Text: numberPattern
Zoned: 3
binary: 8
Pkd/bcd: TotalDigits+1/2

DateTime Calendarpattern
Date Calendarpattern
Time Calendarpattern
Duration Calendarpattern
Boolean Length of textBooleanTrue 32
HexBinary n/a Length/maxlength

Alan Powell

MP 211, IBM UK Labs, Hursley, Winchester, SO21 2JN, England
Notes Id: Alan Powell/UK/IBM email: alan_powell@uk.ibm.com
Tel: +44 (0)1962 815073 Fax: +44 (0)1962 816898

Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number 741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

Property Name	Description
textStringPad	Enum Valid values ‘none’, ‘fixed’, ‘minLength’ Controls how an item is justified on output when the actual length of a text string is different from the specified length. Controls how an item is trimmed on input if textTrimKind is padChar If ‘none’ the string is expected to match the length. Otherwise: - If lengthKind results in a fixed length: If shorter than the specified length it is padded with the pad character. If longer than the specified length it is truncated. - If lengthKind is ‘prefixed’: If the string is longer than any specified maximum length it is truncated.
textStringJustification	Enum Valid values ‘left’, ‘right’, ‘center’ ‘center’ adds equal padChars before and after the string contents if the string is too short. It adds one extra padChar before if needed. ‘center’ truncates equal numbers of characters before and after if the string is too long. It removes one extra character at the front of the string if needed. [OMG/CAM property justification] Annotation: dfdl:element (simple type ‘string’)
textStringPadCharacter	String. The padding character used as the default for justification of text elements. In fixed width character sets this must contain a full single character representation. So if hex entities are used, enough hex bytes must be supplied to provided the full width of a character. In variable width character sets, this character must be a minimum-width character unless it is specified as an entity (see section TBD Entities) Annotation: dfdl:element (simple type ‘string’)

Property Name	Description
textNumberPad	Enum Valid values ‘none’, ‘fixed’, ‘minLength’ Controls how an item is justified on output when the actual length of a text string is different from the specified length. Controls how an item is trimmed on input if textTrimKind is padChar If ‘none’ the string is expected to match the length. Otherwise: - If lengthKind results in a fixed length: If shorter than the specified length it is padded with the pad character. If longer than the specified length it is truncated. - If lengthKind is ‘prefixed’: If the string is longer than any specified maximum length it is truncated.
textNumberJustification	Enum Valid values ‘left’, ‘right’, ‘center’ ‘center’ adds equal padChars before and after the string contents if the string is too short. It adds one extra padChar before if needed. ‘center’ truncates equal numbers of characters before and after if the string is too long. It removes one extra character at the front of the string if needed. [OMG/CAM property justification] Annotation: dfdl:element (simple type ‘string’)
textNumberPadCharacter	String. The padding character used as the default for justification of text elements. In fixed width character sets this must contain a full single character representation. So if hex entities are used, enough hex bytes must be supplied to provided the full width of a character. In variable width character sets, this character must be a minimum-width character unless it is specified as an entity (see section TBD Entities) Annotation: dfdl:element (simple type ‘string’)

Property Name	Description
textCalendarPad	Enum Valid values ‘none’, ‘fixed’, ‘minLength’ Controls how an item is justified on output when the actual length of a text string is different from the specified length. Controls how an item is trimmed on input if textTrimKind is padChar If ‘none’ the string is expected to match the length. Otherwise: - If lengthKind results in a fixed length: If shorter than the specified length it is padded with the pad character. If longer than the specified length it is truncated. - If lengthKind is ‘prefixed’: If the string is longer than any specified maximum length it is truncated.
textCalendarJustification	Enum Valid values ‘left’, ‘right’, ‘center’ ‘center’ adds equal padChars before and after the string contents if the string is too short. It adds one extra padChar before if needed. ‘center’ truncates equal numbers of characters before and after if the string is too long. It removes one extra character at the front of the string if needed. [OMG/CAM property justification] Annotation: dfdl:element (simple type ‘string’)
textCalendarPadCharacter	String. The padding character used as the default for justification of text elements. In fixed width character sets this must contain a full single character representation. So if hex entities are used, enough hex bytes must be supplied to provided the full width of a character. In variable width character sets, this character must be a minimum-width character unless it is specified as an entity (see section TBD Entities) Annotation: dfdl:element (simple type ‘string’)

Simple type	text (+ xml)	binary
String	Length/maxlength	n/a
Float	Text: numberPattern (length of positive subpattern) Zoned: TotalDigits	32
Double	Text: numberPattern Zoned: TotalDigits	64
Decimal/Integer	Text: numberPattern Zoned: TotalDigits	Pkd/bcd: TotalDigits+1/2
Long, UnsignedLong	Text: numberPattern Zoned: 19	binary: 64 Pkd/bcd: TotalDigits+1/2
Int, Unsignedint	Text: numberPattern Zoned: 10	binary: 32 Pkd/bcd: TotalDigits+1/2
Short, Unsignedshort	Text: numberPattern Zoned: 5	binary: 16 Pkd/bcd: TotalDigits+1/2
Byte, Unsignedbyte	Text: numberPattern Zoned: 3	binary: 8 Pkd/bcd: TotalDigits+1/2
DateTime	Calendarpattern
Date	Calendarpattern
Time	Calendarpattern
Duration	Calendarpattern
Boolean	Length of textBooleanTrue	32
HexBinary	n/a	Length/maxlength