2b:null 2c:["$","title",null,{"children":"ELS 2026 papers to conclude the series on using NDB interpreted code | datagenous | Observable"}] 31:Tc92,${await FileAttachment("20260511T113501-919_Retzlaff_Foto-Kessler_c_1024ct.jpg").image( {title: "picture taken during first presentation, 11 May 2026", style: "margin-bottom: 20px"})} # ELS 2026 papers to conclude the series on using NDB interpreted code May 26, 2026. Max-Gerd Retzlaff, Datagraph GmbH, Berlin. *This is the forth article in [a series on using NDB interpreted code (IC) programs with RonDB](/@datagenous/ndb-interpreted-code-article-series) and it contains the promised closer look at the [NDB IC Compiler](https://github.com/datagraph/cl-ndbapi/tree/main/ndb-ic-compiler) and how our graph database Dydra uses it.* *To conclude the series I decided not to write more blog posts but rather two formal research papers, which I presented at [The 19th European Lisp Symposium (ELS'26)](https://european-lisp-symposium.org/2026/), Krakow, Poland, 11-12 May 2026.* ## 1^st paper:
Efficient range estimation with NDB interpreted code The first paper is a more formale and concise version of the blog post A very short NDB interpreted program: row counts and range estimations. You have a choice of three ways to ingest it:

research paper:
Retzlaff, Max-Gerd (2026, May 11). Efficient range estimation with NDB interpreted code. The 19th European Lisp Symposium (ELS'26), Krakow, Poland. https://doi.org/10.5281/zenodo.20288900
presentation slides
recording of the presentation on May 11th, 2026, 11:30–12:00 (external link to twitch.tv)
(This is a direct link to my part at 06:30:15.)

## 2^nd paper:
A Lisp dialect for NDB interpreted code This paper is the long-promised in-depth introduction to the [NDB IC Compiler](https://github.com/datagraph/cl-ndbapi/tree/main/ndb-ic-compiler). Again, you have three choices:

research paper:
Retzlaff, Max-Gerd (2026, May 11). A Lisp dialect for NDB interpreted code. The 19th European Lisp Symposium (ELS'26), Krakow, Poland. https://doi.org/10.5281/zenodo.20290252
presentation slides
recording of the presentation on May 12th, 2026, 16:00–16:30 (external link to twitch.tv)
(This is a direct link to my part at 06:30:15.)

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