A digital object identifier (DOI) is a globally unique string that identifies an electronic document (for example, a PDF of an academic article). It essentially provides a method for creating a per...

I have a table of citations that includes the last name of the first author, the title, journal, year, and page numbers for each citation. I have posted the first few lines of the table on Google D...

There are quite a lot of tools to extract text from PDF files[1-4]. However the problem with most scientific papers is the hardship to get access PDF directly mostly due to the need to pay for them...

I was wondering if it is possible to "automate" the task of typing in entries to search forms and extracting matches from the results. For instance, I have a list of journal articles for which I wo...

I have recently been using the excellent rplos package, which makes it very easy to search through papers hosted on the Public Library of Science (PLOS) API. I've hit a snag, in that the API itself...

The DOI system places basically no useful limitations on what constitutes a reasonable identifier. However, being able to pull DOIs out of PDFs, web pages, etc. is quite useful for citation informa...

I am conducting some research on identify DOI in free format text. I am using Java 8 and REGEX I Have found these REGEX's that are supposed to fulfil my requirements /^10.\d{4,9}/[-._;()/:A-Z0-9...

I want to add a field to my database that stores DOIs. But I can't seem to find out what their maximum length is. Does anyone know if there is a maximum length?

I see that GitHub has DOI integration through Zenodo but is there an equivalent tool for Bitbucket? Or do I have to contact a DOI Registration Agency directly?