## 1 Introduction  
A distributed registry-directory system as a cyberinfrastructure for _who-what-where_ metadata management in support of navigation, search, and queries of the semantic web has been designed [1, 2] using architectural principles inspired by the examples of the corresponding systems previously established for the original web. The Problem Oriented Registry of Tags And Labels (PORTAL) and the Domain Ontology Oriented Resource System (DOORS) for the semantic web have been devised to function as interacting systems of registries and directories for the semantic web in a manner analogous to those used for the original web, namely, the Internet Registry Information Service (IRIS) and Domain Name System (DNS). The PORTAL-DOORS System (PDS), collectively comprised of these interacting network systems of PORTAL registries and DOORS directories, has been architected as a distributed system for registering resource entities and publishing metadata about them. As a lower-level infrastructure system distinguished from higher-level tools and applications built upon the foundation of the infrastructure, PDS establishes an interoperable, platform-independent, application-independent, messaging interface standard for information exchange over the internet. Moreover, PDS has been purposefully designed to address a variety of major issues and problems including provenance, security, cybersilos, transition barriers, search engine consolidation and the spread of misinformation. In a comprehensive literature review, Taswell [1] discussed the cybersilo problem and other barriers impeding the transition from original web to semantic web. The cybersilo problem has also been expressed as the data integration challenge of coping with an _information tsunami_ in the presence of an _informatics Tower of Babel_[3] resulting from non-interoperable systems (_i.e._, those that cannot effectively communicate with each other). Thus, traditional silos in scholarly scientific discourse have been perpetuated as cybersilos. Transition barriers refer to the complex array of issues that slow the adoption of the new semantic web while continuing use of the original non-semantic web. In a broad sense with reference to general concepts rather than specific technologies, the semantic web can be distinguished from the original web by the presence of sufficient metadata for hyperlinks to enable their navigation by an automated processing agent. This associated metadata may be either explicit markup text and/or implicit inferred context but the automated processing agent must be able to understand the meaning of the metadata (see also [4] for other perspectives on the semantic web, and Figure 2 in this report for the definitions of lexical versus semantic services as used in the context of PDS). More recently, Mowshowitz and Kumar [5] published a commentary with growing concerns about increasing control of web search by a decreasing number of search engines essentially limited to an effective monopoly (currently Google has dominating market share) or oligopoly (currently Google, Yahoo, and Microsoft comprise the top three). To quote Mowshowitz and Kumar [5], this search engine consolidation \"raises the specer of biased information and free speech abridgement\" that implicitly results when information is only accessable and/or accessed through the filter of a search engine. In addition, Berti-Equille _et al._[6] have discussed the problems of conflicting data from multiple data sources, the spread of false information, and the discovery of source dependency. Acemoglu _et al._[7] provided a theoretical analysis of these concerns, especially, the spread of misinformation. Guided by architectural principles intended to address all of these major problems, PDS has been designed to operate as a hybrid between the original web and the semantic web with mechanisms that serve both the original web and the semantic web simultaneously as well as either one independently of the other.