xmldtdxmllint

xmllint not validating with DTD when --stream used

I'm trying to use xmllint to validate very large (3-4 gig) XML files against an external DTD using the --dtdvalid switch. It appears that when also using --stream, no DTD validation occurs.

I've tested using much smaller XML files, and when not using the --stream switch with this command: xmllint --noout --nonet --timing --dtdvalid Test.dtd Test.xml

I get expected output:

Parsing took 42 ms
Parsing DTD took 0 ms
<Lots of errors here because the XML is purposely wrong to get errors>
Document Test.xml does not validate against Test.dtd
Validating against DTD took 1148 ms
Freeing took 7 ms

But if I add the --stream option, it appears to ignore DTD validation.

xmllint --stream --noout --nonet --timing --dtdvalid Test.dtd Test.xml

Output shows only XML well-formed validation, no signs that it tried to validate against the DTD:

Parsing took 41 ms

Does DTD validation not work with --stream on purpose, or am I missing something obvious to everyone but me? Using xmllint version 20913 if it matters.

Solution

  • According to the man page:

    --stream Use streaming API - useful when used in combination with --relaxng or --valid options for validation of files that are too large to be held in memory.

    So the command line should be:

    xmllint --stream --noout --nonet --timing --valid --dtdvalid tutorials.dtd tutorials.xml 

Parsing and validating took 0 ms