I'm currently working on a project to create a database (for analysis later on) of 100 journals, and all the articles for these journals between 1969 and 2014. This of course results in over half a million articles. The most important parameters i need for these articles is the JEL code and the date(year) of publication. So far I have created a list of journals and used the crossref API to get an approximation of the number and names of articles they include.
Example is for the journal "Econometrica", the API query: http://search.crossref.org/?q=Econometrica&type=Journal+Article Returns 6200+ articles, each of them with full name and a DOI link. The problem is the DOI link does not always include the general information, however they often include the pdf version of the article, which in term of data crawling is not really efficient to scan through 500.000 articles for JEL code.
I was wondering if you know another database/API that might return the JEL and publication date by using the article name as query?