CompoundElement [{spec1,spec2,…}]
represents a form or interpreter specification for a list of fields or inputs that gives a list of results.
CompoundElement [key1spec1,key2spec2,…]
represents a form or interpreter specification that gives an association of results.
CompoundElement
CompoundElement [{spec1,spec2,…}]
represents a form or interpreter specification for a list of fields or inputs that gives a list of results.
CompoundElement [key1spec1,key2spec2,…]
represents a form or interpreter specification that gives an association of results.
Details
- In the context of Interpreter , speci can be any specification used for Interpreter , including CompoundElement or RepeatingElement .
- In the context of FormObject and FormFunction , speci can be any specification used for forms, including the full association, but only simple structures can be visualized as a table of fields.
- Interpreter [CompoundElement[{form1,form2,…}]][{input1,input2,…}] is effectively equivalent to {Interpreter [form1][input1],Interpreter [form2][input2],…}.
- In Interpreter [CompoundElement[{form1,form2,…}]][{input1,input2,…}], the list of inputi must be the same length as the list of formi. If it is not, a Failure object is generated.
- The result from Interpreter [CompoundElement[<|key1->spec1,…|>]][input] is an association that contains elements for each of the keyi. If input is a list, each successive keyi is used in order. If input is an association, any keyi missing from it is returned as a missing element, and any value associated with a key that is not one of the keyi is dropped.
- Any of the speci can themselves be CompoundElement or RepeatingElement objects.
Examples
open all close allBasic Examples (4)
Use CompoundElement to combine Interpreter calls of any kind:
Use CompoundElement to speed up Interpreter by grouping calls that require connectivity to the Wolfram Cloud:
CompoundElement will fail on data that does not have the correct shape:
Use in a form to create a row of fields:
The result will be a nested association:
Applications (2)
Interpret data that has a complex structure:
Use an association input to coerce the data to the right shape:
Properties & Relations (3)
Use CompoundElement with RepeatingElement to interpret even more complicated structures:
Use with RepeatingElement in the context of FormFunction to generate a table of fields:
Use CompoundElement in conjunction with Alternatives to interpret data that can have different shapes:
History
Text
Wolfram Research (2015), CompoundElement, Wolfram Language function, https://reference.wolfram.com/language/ref/CompoundElement.html.
CMS
Wolfram Language. 2015. "CompoundElement." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/CompoundElement.html.
APA
Wolfram Language. (2015). CompoundElement. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/CompoundElement.html
BibTeX
@misc{reference.wolfram_2025_compoundelement, author="Wolfram Research", title="{CompoundElement}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/CompoundElement.html}", note=[Accessed: 17-November-2025]}
BibLaTeX
@online{reference.wolfram_2025_compoundelement, organization={Wolfram Research}, title={CompoundElement}, year={2015}, url={https://reference.wolfram.com/language/ref/CompoundElement.html}, note=[Accessed: 17-November-2025]}