JNVDL

If you're looking for a reliable software for validating multi-namespace XML documents, then JNVDL might be the perfect tool for you! As a free and open source implementation of the NVDL specification, JNVDL was developed from scratch as part of a thesis, making it a reliable option for your validation needs.

One of the most impressive things about JNVDL is that it has just one external dependency- JDOM library. This Java-based library allows mapping of XML instances into Java objects that can be easily manipulated and outputted back into XML. This makes validation of multi-namespace documents a lot easier.

Additionally, JNVDL also supports JAXP validation API, which makes it easier to work with the software. You don't have to worry about compatibility issues or other problems, as JNVDL has been developed with a focus on seamless validation of XML documents, regardless of their complexity.

In summary, JNVDL is a powerful and reliable tool that can simplify multi-namespace XML documents validation, thereby improving software efficiency. It is definitely worthy of being considered in any software review as a dependable solution for your XML validation needs.