> For the complete documentation index, see [llms.txt](https://docs.unsub.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unsub.org/how-to-guides/post-termination-access-data.md).

# Post-termination access data

Tracking down PTA can be a time consuming task. For some tips/guidance on this topic here are some resources:

* Bremer, C. & Lavallée-Funston. (2022). It’s (perpetually) Complicated: Tracking Perpetual Access Rights from Consortial License Agreements. Camp ER\&L 2022 <https://mtgsked.com/p/31465/s> ([slides](https://www.crkn-rcdr.ca/sites/crkn/files/2022-04/ER%26L2022_KBESC_PATrackingProject_2022-03-10_sharing_0.pptx))
* Carter, S., & Toyota-Kindler, Y. (2021). Assessing e-journal post-cancellation access. *Against the Grain*, *31*(4), 12. [pdf](https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=8412\&context=atg)
* Donahoo, N. S., & Aguilera, A. (2019). An Ongoing Treasure Hunt: One Library’s Practical Experiences Documenting Post-Cancellation Perpetual Access. The Serials Librarian, 76(1-4), 83-85. <https://doi.org/10.1080/0361526X.2019.1586234>
* Bazeley, J. (2018). Report of the ALCTS Collection Management and E-Resources Interest Group Meeting. ALA Annual Conference, Chicago, June 2017. Technical Services Quarterly, 35(3), 291–296. <https://doi.org/10.1080/07317131.2018.1456858>
* Bulock, C. (2015). Techniques for Tracking Perpetual Access. The Serials Librarian, 68(1-4), 290-298. <https://doi.org/10.1080/0361526X.2015.1017711>
* Stemper, J., & Barribeau, S. (2013). Perpetual Access to Electronic Journals. *Library Resources & Technical Services*, *50*(2), 91-109. <https://doi.org/10.5860/lrts.50n2.91>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.unsub.org/how-to-guides/post-termination-access-data.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
