Since 2012, DOAJ has been on a path of data quality improvement. DOAJ metadata is used all over the world and all over the Web. Improving and fixing the quality of our metadata can be painstaking work but the effort goes a long way as changes propagate across the Web via search engines, aggregator databases, library portals and other databases.
Along these lines, the largest publisher (in terms of the number of journals) in DOAJ recently added missing abstracts to over 100,000 articles and fixed broken special characters in approximately 2000 more. This was a huge effort on their part and DOAJ is grateful for the work that has gone into this project. It is an achievement that will be welcomed by DOAJ metadata consumers.
To date, Hindawi has 161,334 articles loaded to DOAJ and until recently was the largest contributor of metadata to our index. That title was taken from them recently when DOAJ ingested the entire PLOS archive from Europe PMC.
DOAJ News Service 
Reblogged this on Sridhar Gutam.
So, the publisher who improved the metadata was Hindawi or Europe PMC?
Hi Bob
It was Hindawi. So far, DOAJ has only harvested Europe PMC for PLOS.
Best, Dom
It’s good to know that things are going well.
Its a good move and I would like to join hands in such projects. FYI I am already a volunteer for DOAJ.
Sulthan, we are very appreciative of your volunteer work. Thank you!