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Unflatten From XML

LabVIEW 8.5 Help
August 2007

NI Part Number:
371361D-01

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Converts an XML string to a LabVIEW data type.

If xml string contains the characters &lt;, &gt;, or &amp;, the function converts those characters to <, >, or &, respectively. Use the Unescape XML VI to convert other characters, such as &quot;.

Example

xml string is the XML string that includes the data you want to convert. xml string must conform to the LabVIEW XML schema, including the case and order of tags in the schema. If xml string does not conform to the schema, the function returns an error and value contains the default value for the data type wired to type. If the VI containing the function previously completed execution, value contains the value from the previous execution.

In xml string, this function accepts only the period (.) as a decimal separator. The function does not recognize localized decimal separators. This restriction prevents errors when you use XML strings on operating systems with different settings for the decimal separator.
type is the data type to which you want to convert xml string.
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
value is the data type you specified in type and the data in xml string.
Note  Although you can flatten LabVIEW variant data to XML, attempting to unflatten variant data from XML results in an empty LabVIEW variant.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Example

Refer to the Unflatten XML Data VI in the labview\examples\file\XMLex.llb for an example of using the Unflatten From XML function.


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