Missing license information after XML deposit

Content Registration XML Deposit
, , , ,
1

Hi Crossref,

We noticed that a good number of XML deposits contain two license_ref data as part of the crossmark custom_metadata XML, but one usually appears in the api.crossref.org.works API.

Can you take a look to see if the XML deposits contained the appropriate data?
Here are some examples where only one license data appears when two should.

api crossref org/works/10.1103/PhysRevA.111.012619
api crossref org/works/10.1103/PhysRevA.111.013711
api crossref org/works/10.1103/PhysRevA.111.013109
api crossref org/works/10.1103/PhysRevB.111.014311

These were submitted in 2025.

api crossref org/works/10.1103/PhysRevA.107.L040601 showed 1 license and then I regenerated the XML, verified it generated two license data and submitted it. Today I verified that both license information shows as expected.

Wondering if this is a known issue as it seems to come and go as I examine data between 2023 and 2025.

Thanks for all your help.

P.S. Being able to include links would be very useful

3

Hello @mklem ,

First off, I have updated your account here on the forum so you can add links. Sorry about that. I thought you already had those privileges.

As for the license information, you can see what is registered in the XML, by viewing these records in the XML API:

Screenshot 2025-07-25 at 1.13.21 PM
Screenshot 2025-07-25 at 1.13.21 PM2352×914 359 KB

There is only one license in the XML, as you can see from the Crossmark metadata above.

Compare that to DOI 10.1103/PhysRevA.107.L040601

Screenshot 2025-07-25 at 1.15.19 PM
Screenshot 2025-07-25 at 1.15.19 PM1250×866 140 KB

I have reviewed the XML that was sent to us for these DOIs. This XML in the XML API matches what was submitted to us.

Warm regards,
Isaac

4

Thanks Isaac,

Some what related question. What is the difference between these APIs:
https://api.crossref.org/works/10.1103/6cm6-s6g7
and

This DOI (10.1103/6cm6-s6g7) was submitted today, but https://api.crossref.org/works/10.1103/6cm6-s6g7 shows only 1 license

Properties of states near <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>E</mml:mi> <mml:mi>x</mml:mi> </mml:msub> <mml:mo>=</mml:mo> <mml:mn>6</mml:mn> </mml:mrow> </mml:math> MeV in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mi>Ne</mml:mi> <mml:mprescripts /> <mml:none /> <mml:mn>18</mml:mn> </mml:mmultiscripts> </mml:math> through <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mmultiscripts> <mml:mi mathvariant="normal">F</mml:mi> <mml:mprescripts /> <mml:none /> <mml:mn>17</mml:mn> </mml:mmultiscripts> <mml:mo>+</mml:mo> <mml:mi>p</mml:mi> </mml:mrow> </mml:math> scattering shows both licenses

5

second url is supposed to be
https ://doi.crossref.org/search/doi?pid=support@crossref.org&format=unixsd&doi=10.1103/6cm6-s6g7

(had to put a space it so you can see it).

6

Hello @mklem ,

https://api.crossref.org/works/10.1103/6cm6-s6g7 is the REST API - results in JSON

https://doi.crossref.org/search/doi?pid=support@crossref.org&format=unixsd&doi=10.1103/6cm6-s6g7 is the XML API - results in XML

The REST API can take up to 24 hours to index after a successful registration. The XML API, because it does not have to convert the input XML to JSON, usually indexes a record in two to three afters after registration.

I see both licenses for DOI 10.1103/6cm6-s6g7 in the XML API. That update may not be indexed by the REST API until tomorrow:

Screenshot 2025-07-25 at 2.01.02 PM
Screenshot 2025-07-25 at 2.01.02 PM1108×379 59.3 KB

Warm regards,
Isaac