WARNING:tensorflow:Early stopping conditioned on metric `val_loss` which is not available. Available metrics are: xxx

Error message 

"WARNING:tensorflow:Early stopping conditioned on metric `val_loss` which is not available. Available metrics are: loss,mae,mse,mape"

Cause

This is normally due to the validation dataset is empty, so there is no associated val_loss for the empty validation data.

RDFa Validation, Crawling for Websites

Tested RDFa Validation with RDFa Validator for http://wiseword.tk (which will be redirected to http://guangyuan.dothome.co.kr)

Validation result....

The source is valid, but when I try to use Apache Any23, it is failed...

Apache Any23 Extraction Result...

Because of the vocabularies are limited for below listings? Then, this tool could not be used for extracting SIOC data and so that LDspider (which is crawling framework based on Any23) as well?

• Vocabularies: Extraction support for CSV, Dublin Core Terms, Description of a Career, Description Of A Project, Friend Of A Friend, GEO Names,
  ICAL, lkif-core, Open Graph Protocol, BBC Programmes Ontology, RDF Review Vocabulary, schema.org, VCard, BBC Wildlife Ontology and XHTML.

There are tools provided from RDFa website which could be used on validation and crawling as well.

After using Semargl API to check the resource, I found out that there are several missing pieces for the tested document. It will be working fine on Any23 as well after revise.

Related articles

• RDFa 1.1 Core, RDFa Lite and XHTML+RDFa published as Candidate Recommendations
• RDFa 1.1 is a Formal Recommendation
• RDFa Core 1.1, RDFa Lite 1.1 and XHTML+RDFa 1.1 are W3C recommendation