Schema validation of control totals

[Steve]

Hi,

I have xml data containing "line item" elements and a "footer" element
which contains control totals for the line items. While I can easily
validate the control totals in xslt, I have not been able to do it
using a schema, which I need to do.

Example:
<data>
<item><fld1>1</fld2><fld2>2</fld2></item>
<item><fld1>3</fld2><fld2>4</fld2></item>
<item><fld1>5</fld2><fld2>6</fld2></item>
<footer><tot1>10</tot1><tot2>12</tot2></footer>
</data>

Given the above, where tot1 and tot2 are control totals for fld1 and
fld2, the required schema validation should raise an error because
tot1 should be 9, whereas it is actually 10.

Is it possible?

Thanks in advance,
Steve.

 

[Martin Honnen]

Hi,

I have xml data containing "line item" elements and a "footer" element
which contains control totals for the line items. While I can easily
validate the control totals in xslt, I have not been able to do it
using a schema, which I need to do.

Example:
<data>
<item><fld1>1</fld2><fld2>2</fld2></item>

I think you want

<item><fld1>3</fld2><fld2>4</fld2></item>
<item><fld1>5</fld2><fld2>6</fld2></item>
<footer><tot1>10</tot1><tot2>12</tot2></footer>
</data>

Given the above, where tot1 and tot2 are control totals for fld1 and
fld2, the required schema validation should raise an error because
tot1 should be 9, whereas it is actually 10.

Is it possible?

I don't think it is possible with the W3C XML schema language. It should
be possible with other schema languages that allow to specify
constraints with XPath.

 

[Steve]

Thanks Martin - pretty much what I had gathered. Thanks for your assistance.

Steve.