Modern software is embedded in sociotechnical and physical systems. It relies on computational support from interdependent subsystems as well as non-code resources such as data, communications, sensors, and interactions with humans. General-purpose programming languages and mainstream programming language research both focus on symbolic notations with well-defined semantics that are used by professionals to create correct solutions to precisely-specified problems. However, these address only a modest portion of this modern software.

Persistent myths reinforce this focus. These myths provide a lens for examining modern software: Highly-trained professionals are outnumbered by vernacular developers; writing new code is dominated by composition of ill-specified software and non-software components; general-purpose languages and functional correctness are often less appropriate than domain-specific languages and fitness for task; and reasoning about software is challenged by uncertainty and non-determinism in the execution environment, especially with the advent of systems that rely on machine learning. The lens of our persistent myths illuminates emerging opportunities and challenges for programming language research.

This talk is about the paradigm shifts from Programming Systems to Programming Languages and back. The speakers will discuss historical, philosophical, and methodological issues, and how patterns can provide a template for thinking about incommensurable world views.

Our workshop explores the interaction between Design Pattern Languages and Causal Layered Analysis (CLA) in the context of a cooperative game. It also introduces attendees to these methods, assuming no previous background. The theme of the workshop is amelioration of and adaptation to climate change in an urban setting. Since cities account for more than 70% of global CO2 emissions, the workshop will help participants engage with a crucial challenge of our time.

Open space helps people like event organizers and participants to run an egalitarian, meritocratic, and self-organizing process. Participants are pulled into creating the event, bringing their problems and their expertise to the table. Open space itself then is about the techniques that help participants form a joint agenda, negotiate and allocate time-slots, and then meet and discuss their issues until it is time to move on to the next topic and/or group.

Open Space time will be allocated at PLoP to promote the self-organization of things by attendees. Although one can't predict specific outcomes, it's usually highly productive for whatever issue people want to address. Sometimes inspiring side effects are noted and there are usually interactive fascinating dialogues. These can include games, self organized focus groups, BoFs, or almost anything. There is often a play like atmosphere with laughter and often very interesting results and engaging discussions and ideas.

Christian Kohls, PhD, and a professor for computer science and socio-technical systems at Germany’s largest university of applied sciences, the TH Köln. Patterns are a big part of his life – including software patterns, educational patterns, and patterns for creative thinking. Being a regular PLoP participant he never misses a game session – for the fun, inspiration and community building.

The KnowledgeScience Manifesto Pattern Language Guide
by Francis Anderson

Composite Pattern of Edge-Eligible Deployment Plan for Modular Software
by Dionysis Athanasopoulos

Visualizing hidden relationships between organizational patterns
by Viktor Matovic, Waheedullah Sulaiman Khail, Valentino Vranic