Short answer, no.
We ran into this same issue with IPFIX I think. It has descriptive stuff at the
start, then data according to that description. Actually in IPFIX I think you
can have a bunch of alternating blocks of description and data
You have to generate a DFDL schema from the descriptive stuff, then compile and
use that to parse.
It's an artifact of XML Schema that we cannot have a schema for
<foo>bar</foo>
unless "foo" is a constant found in the XML Schema as the value of the name
attribute of some element declaration.
Is there an easy XSLT that would take all occurrences of:
<item>
<name>foo</name>
<value>bar</value>
</item>
and create
<foo>bar</foo>
???
I would hope that's an easy XSLT, but I haven't given it much thought.
________________________________
From: Costello, Roger L. <[email protected]>
Sent: Wednesday, October 3, 2018 2:02:28 PM
To: [email protected]
Subject: How to declare an element whose name is the value of another element?
Hello DFDL community,
My input file first has column headings such as "name" and "line". After the
column headings come a series of records. The first field in each record should
be labeled by the first column heading, the second field by the second column
header, and so forth. For example, if the column header has this:
<columns>
<column>
<name>name</name>
</column>
<column>
<name>line</name>
</column>
</columns>
Then a record would look like this:
<record>
<name>Van Dorn Street</name>
<line>blue</line>
</record>
How to dynamically generate an element name? I imagine something along these
lines:
<xs:element name="record" ...>
<xs:complexType>
<xs:sequence>
<xs:element name="{get the value of ../../columns/column[1]/name}"
.../>
<xs:element name="{get the value of ../../columns/column[2]/name}"
.../>
</xs:sequence>
</xs:complexType>
</xs:element>
Is it possible in DFDL to declare an element with a name that is the value of a
previous field?
/Roger
