IPWorks EDIFACT 2020 Node.js Edition

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XPath Property

Provides a way to point to a specific segment in the document.

Syntax

 edifactreader.getXPath([callback])
 edifactreader.setXPath( XPath, [callback])

Default Value

""

Callback

The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).

The callback for the getXPath([callback]) method is defined as:

function(err, data){ }

'err' is the error that occurred. If there was no error, then 'err' is 'null'.

'data' is the value returned by the method.

The callback for the setXPath([callback]) method is defined as:

function(err){ }

'err' is the error that occurred. If there was no error, then 'err' is 'null'.

'err' has 2 properties which hold detailed information:

err.code
err.message

Remarks

The path is a series of one or more segment accessors separated by '/'. The path can be absolute (starting with '/') or relative to the current XPath location.

The following are possible values for an element accessor:

IXRefers to the Interchange (root) node
FGRefers to a Functional Group node
TXRefers to a Transaction Set node
'name'The first segment or loop of the current container with the given schema name
name[i]The i-th segment of the current container with the given schema-name
[i]The i-th segment of the current container
[last()]The last segment of the current container
[last()-i]The segment located at the last location minus i in the current container
..The parent of the current container

When XPath is set to a valid path, XSegment points to the name of the segment, with XTag, XSegmentType, and XChildren providing other properties of the segment. The elements of the current segment are provided in the XElements properties.

BuildDOM must be set to bdEntireDocument or bdTransaction prior to parsing the document for the XPath functionality to be available.

Example (Setting XPath)

Document root (Interchange)EDIReaderControl.XPath = "/"
N1 segment in the first transactionEDIReaderControl.XPath = "/IX/FG/TX/N1Loop1/N1"
3-th instance of the N2 segmentEDIReaderControl.XPath = "/IX/FG/TX/N1Loop1/N2[3]"

Data Type

String

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IPWorks EDIFACT 2020 Node.js Edition - Version 20.0 [Build 8162]