FieldDefinitions (Xanthos)

FieldDefinitions Module

Namespace: Xanthos.Core.Records
Assembly: Xanthos.dll

Field definition DSL for parsing fixed-length JV-Data records.

JV-Link returns data as fixed-length byte arrays where each field occupies a specific byte range. This module provides a DSL to define field specifications declaratively.

Usage Example:

 let raFields = [
     text "RecordType" 0 2       // Bytes 0-1: "RA"
     date "RaceDate" 2 8 "yyyyMMdd"
     int "RaceNumber" 10 2
     text "RaceName" 12 60
 ]

val raFields: obj list

Multiple items
val int: value: 'T -> int (requires member op_Explicit)

--------------------
type int = int32

--------------------
type int<'Measure> = int

Types

Type	Description
FieldEncoding	Represents how a field value should be encoded/decoded.
FieldSpec	Represents a field position in a fixed-length record.

Functions and values

Function or value	Description
`bytes name offset length` Full Usage: `bytes name offset length` Parameters: name : `string` offset : `int` length : `int` Returns: `FieldSpec`	Define a raw bytes field name : `string` offset : `int` length : `int` Returns: `FieldSpec`
`code name offset length table` Full Usage: `code name offset length table` Parameters: name : `string` offset : `int` length : `int` table : `string` Returns: `FieldSpec`	Define a code table field name : `string` offset : `int` length : `int` table : `string` Returns: `FieldSpec`
`date name offset length format` Full Usage: `date name offset length format` Parameters: name : `string` offset : `int` length : `int` format : `string` Returns: `FieldSpec`	Define a date field name : `string` offset : `int` length : `int` format : `string` Returns: `FieldSpec`
`decimal name offset length precision` Full Usage: `decimal name offset length precision` Parameters: name : `string` offset : `int` length : `int` precision : `int` Returns: `FieldSpec`	Define a decimal field with precision name : `string` offset : `int` length : `int` precision : `int` Returns: `FieldSpec`
`flag name offset length` Full Usage: `flag name offset length` Parameters: name : `string` offset : `int` length : `int` Returns: `FieldSpec`	Define a flag field name : `string` offset : `int` length : `int` Returns: `FieldSpec`
`int name offset length` Full Usage: `int name offset length` Parameters: name : `string` offset : `int` length : `int` Returns: `FieldSpec`	Define an integer field name : `string` offset : `int` length : `int` Returns: `FieldSpec`
`text name offset length` Full Usage: `text name offset length` Parameters: name : `string` offset : `int` length : `int` Returns: `FieldSpec`	Define a text field (with normalization) name : `string` offset : `int` length : `int` Returns: `FieldSpec`
`textRaw name offset length` Full Usage: `textRaw name offset length` Parameters: name : `string` offset : `int` length : `int` Returns: `FieldSpec`	Define a raw text field (without normalization) name : `string` offset : `int` length : `int` Returns: `FieldSpec`