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Update arXiv regex #37

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Update arXiv regex #37

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9 changes: 4 additions & 5 deletions utilities.js
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Original file line number Diff line number Diff line change
Expand Up @@ -430,13 +430,12 @@ var Utilities = {

// Next try arXiv
if (!identifiers.length) {
// arXiv identifiers are extracted without version number
// i.e. 0706.0044v1 is extracted as 0706.0044,
// because arXiv OAI API doesn't allow to access individual versions
let arXiv_RE = /((?:[^A-Za-z]|^)([\-A-Za-z\.]+\/\d{7})(?:(v[0-9]+)|)(?!\d))|((?:\D|^)(\d{4}\.\d{4,5})(?:(v[0-9]+)|)(?!\d))/g;
// arXiv identifiers are extracted with and without version number
// i.e. 0706.0044v1 is extracted as [0706.0044v1, 0706.0044, 1]
let arXiv_RE = /\b(([-A-Za-z.]+\/\d{7}|\d{4}\.\d{4,5})(?:v(\d+))?)(?!\d)/g; // 1: full ID, 2: ID without version, 3: version #
let m;
while ((m = arXiv_RE.exec(text))) {
let arXiv = m[2] || m[5];
let arXiv = m[1];
if (arXiv && !foundIDs.has(arXiv)) {
identifiers.push({arXiv: arXiv});
foundIDs.add(arXiv);
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