Knowledge becomes infrastructural when its validity can no longer be separated from the conditions that allow it to circulate, encounter difference, survive revision and acquire consequence. A relational infrastructure is therefore neither a repository nor a neutral support beneath research. It is the organised field of protocols, interfaces, capacities, temporalities and institutions through which heterogeneous forms of knowing become mutually addressable. Credibility does not travel alone; Cash’s coupling of credibility, salience and legitimacy already establishes that information becomes operative only within relations that connect evidential adequacy to situated relevance and procedural recognition. Once this premise is accepted, the boundary between knowledge and action changes status. It ceases to be a line separating completed science from later application and becomes a productive zone requiring translation, mediation and sustained institutional labour. Knowledge is made through the conditions of its passage. The epistemic consequence is significant. Context cannot remain exterior to knowledge if actors, histories, languages, values and infrastructures participate in determining what can be asked, recorded, compared and used. The problem registered in the early debate around Mode 2 was precisely this displacement: contextualisation appears simultaneously descriptive, normative and ontological. Contemporary work makes that ambiguity more operational. Andrews et al. specify boundary work as a repertoire of activities; Witinok-Huber et al. construct an evaluative Wheel in which identity and relationality join trust, resources and socio-cognitive gains; Laggan et al. demonstrate that even those who convene participation must learn the competencies required to inhabit a deliberative relation. Transdisciplinarity therefore does not mean the dissolution of disciplines into an undifferentiated whole. It names an ability to organise encounters across irreducible differences while keeping the resulting knowledge revisable, accountable and capable of action.
This relational condition has an institutional and political morphology. Cumiskey et al.’s Real World Labs demonstrate that co-production requires spatially and organisationally situated capacities: collaboration, systems thinking, creativity and reflexivity are cultivated through practice, not guaranteed by the rhetoric of participation. Turek radicalises the infrastructural implication by moving openness upstream into the architecture of research production itself. If inherited infrastructures channel attention and preserve path dependencies, then opening final outputs is insufficient. What must become mutable are the protocols through which contributions enter, are coordinated, tested, modified and redistributed. The open-source model thus exposes an important paradox: decentralisation needs structure. Openness without coordination fragments; coordination without openness reproduces institutional inertia. Relational infrastructure occupies the interval, creating rules robust enough to sustain cumulative work and porous enough to admit difference, correction and unforeseen development.
Its materiality is equally decisive. Di Donato shows that Open Science exists through licences, persistent identifiers, metadata, FAIR principles, distributed networks, standards and durable research infrastructures. These are not merely technical conveniences attached to an already constituted epistemology. They encode assumptions about discoverability, authorship, reuse, publicness and collective intelligence. Taddei and Paolucci extend this argument by describing social research infrastructures as technical systems, organisational frameworks and social contracts whose continuity depends on maintenance and care. Cerbara, Germani and Santurro add the ethical limit: persistence creates responsibilities. Data that remain available across time can exceed the contexts in which consent was first given, making privacy, trust and accountability active design conditions. An infrastructure is consequently an ethical and temporal arrangement as much as a technological one. It governs not only what is stored but what may continue to act. Indexing is not secondary documentation but a mode of making relations possible; publication is not a terminal event but an admission into further circuits of comparison, citation, reuse and mutation; the archive is not a retrospective container but an active temporal device through which previous configurations can exert pressure on later ones. Transdisciplinarity here becomes architectural in the strongest sense: it constructs passages, thresholds, proximities and permissions among heterogeneous epistemic materials. The field remains coherent not because every component speaks the same language, but because differences can enter a shared system of legibility without being reduced to equivalence. Relational infrastructure therefore adds a specific theoretical capacity to Socioplastics: it explains how a large, distributed and heterogeneous field can preserve identity while remaining open to transformation. The critical unit is neither the isolated concept nor the individual document but the consequential relation—what a connection admits, excludes, stabilises, translates, remembers or makes newly actionable. Such relations can be curated, evaluated and redesigned; they possess spatial, political, aesthetic and computational dimensions at once. A field becomes durable when maintenance and mutation cease to be opposites, when openness is coupled to protocols of care, and when public accessibility is designed together with legitimacy, attribution and interpretive plurality. The infrastructure then does more than support knowledge: it becomes one of the forms in which knowledge thinks, persists and acts. For Socioplastics, relational infrastructure turns transdisciplinarity from an aspiration into an architecture of consequential connections.
