|We fielded several questions as part of our recent webinar (recording and slides available here): Semantic Knowledge Graphs are the Governance Architecture of the Future|
Questions from the webinar included:
Q1: How do you customize the panels in the human user interface?
Users can drag and drop panels on to the page. Panels can be arranged as desired. Users can then save the panel arrangement as a custom layout and even share it with others. Each panel can also be maximized and them minimized. Most panels have Settings menu that is used to futher configure its appearance.
Q2: Can the Logical Model also be used to derived OWL schemas (‘ontologies’) that operate at a logical level?
Yes. EDG can run transformation rules, so it is possible to create a class for each logical entity. EDG uses SHACL for ontology modeling. Semantics of SHACL are more aligned with the traditional data modeling schema languages. With this, logical attributes and logical relations can be used to create property shapes associating properties with classes.
Q3: How would you extend the Asset Example for Medical Enterprise to support, say, a consortium of hospitals, all with slightly differing data and technical assets, or even different glossary teminology? What’s the pattern to relate the Assets for hospital A with hospitals B, C, D, etc.?
If your question is about creating organizations, EDG will let you create a new class Consortium that has members and then you could capture members of the consortium. If your question is about aligning different glossary terms used within these organizations, EDG lets you create multiple glossaries. Even within a single organization, it is common to have multiple glossaries used by different groups. Some of them have overlapping terms. Typically, terms that are related or similar are connected using the appropriate relationship. All asset collections in EDG are separate, but at the same time connectable – they are all part of a knowledge graph. Relationship to connect depends on what is the actual relationship. For example, if two terms are exactly the same, you could use a link called “exact match”. If one term is broader than another, you could use “broader” or “broader match”. There are, of course, other options. EDG will help you identify potential matches by suggesting them.
Q4: Could you speak briefly about the hooks between EDG and “production” databases? Is it only through GraphQL?
GraphQL is a very popular API. And JSON is a very popular data exchange format. Unlike REST endpoint, with GraphQL developers do not need to create different endpoints for different needs. A single endpoint can provide acces to data with consuming application deciding the information they need and the structure of the JSON that will be delivered. The same is true for using GraphQL to update EDG. These are some of the reasons we are excited about GraphQL, but it is not the only way to interact with EDG. For example, EDG also offers SPARQL endpoint. RESTful services can be templated/scripted based on user’s needs. Some commonly requested RESTful services come prebuilt. RESTful services can be created as query templates or scripted from pre-built data conversion modules (SPARQLMotion). EDG also connects to data sources through JDBC and can capture their metadata and profile and sample data. XML and tabular (spreadsheet) data can also be ingested. For use wth unstructured content EDG can connect to content repositories and file systems and ingest information about documents in hundreds of formats. In general if there is an API EDG can connect to it.
Q5: Any integration with Github?
EDG uses a database, not files. It can import files. It can also export its information in files. If desired, these files can be stored in Github. The periodic export into Github can be scripted and scheduled. It is fairly uncomon to keep data such as reference datasets or data graphs or data dictionaries in Github, but it is possible.
Typically, however, EDG is deployed and operated as any database system. There are scheduled backups and recovery processes. EDG also offers high availability with server replication. Changes are audit trailed, so there is no danger of losing information.
Q6: Do you have any developer’s or trial version ?
Yes, you can sign up for an evaluation server.
Q7: One view is that data governance must be controlled by workflows. How does that workflow centric view fit into the knowledge graph-based infrastructure you have shown?
TopBraid EDG supports workflows. There are built-in workflows and organizations can create their own custom workflows.
Q8: You showed preexisting models in the environment. Do we have to use those or can we create our own?