![[photo-1545987796-b199d6abb1b4.jpg]] Photo by [Alina Grubnyak](https://unsplash.com/ko/@alinnnaaaa?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/photos/EpGbJpDT8h8?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) The Semantic Web refers to the extension of the World Wide Web via embedding added semantic metadata, using semantic data modeling techniques such as [Resource Description Framework](https://en.wikipedia.org/wiki/Resource_Description_Framework) (RDF) and [Web Ontology Language](https://en.wikipedia.org/wiki/Web_Ontology_Language) (OWL). (Source: Wikipedia) Semantics is an important and mandatory element of MetaNotation, for automated recognition of every object independently of the language, culture or symbol. More importantly, semantics allows composite identification of elements and attributes within ecosystems and systems, disregarding of semantic of higher or lower level of encapsulation. Why we are talking about Semantic WEB and #MetaNotation? Well, there are couple of dots we still need to connect to make our Ecosystems (and their notations) really semantically reference-able: - We have to use any Semantic Master Index for entity and connection references - We have to be able to generate, transform and integrate MetaX analytical MetaNotation - We have to be able to uniquely identify every CIEL symbol at MetaData level - We have to be able to reference any MetaData resource outside of MetaX (Open Meta Data Sets) - Generated script has to be XML (or JSON) based , for portability, distribution and easy-reading purposes Diagram below shows logical connection between #MetaSystem , described by MetaData (top left corner), translated into ontology model (top center) in dependency of referenced Semantic IDs (the SPHERES Semantic ID as an example) and generated into OWL (ontology based) and RDF (describing associations between entities and systems) script (bottom part of the diagram). The OWL part (inside the script), further references dynamic custom ontology for “Ecosystem” and “Entity” and is also recursive referencing “Ecosystem” as an “Entity” with “Connection” object. This ontology fully corresponds with MetaX’s MetaSystem structure and MetaData dynamics described at section “Metadata”. The “RDF” part references (in this short piece of script) RDF schemas and further describes relationship between entities of this MetaSystem example. Example below shows only a small section of the real script, but demonstrates the integration of OWL/RDF with particular semantic master index. ![[Pasted image 20230709113515.png|Figure 1: From MetaSystem to MetaNotation]] **OWL description** The data described by ontology in the #OWL family is interpreted as a set of "individuals" and a set of "property assertions" which relate these individuals to each other. The Ontology consists of a set of axioms which place constraints on sets of individuals (called "classes") and the types of relationships permitted between them. These axioms provide semantics by allowing systems to infer additional information based on the data explicitly provided. OWL is endorsed by the World Wide Web Consortium (W3C) and has attracted academic, medical and commercial interest. **RDF description** The #RDF is based on making associations. It describes data by breaking each data element into three nodes: a subject, predicate and object. RDF Implementation examples: The British Broadcasting Corporation has tested RDF to augment searches of its huge program guide. Best Buy and eBay have encoded their commercial listings in RDF. ## Related to [[Semantic WEB - Roles and Responsibilities]] [[MetaX Semantic Model]]