In Neo4j Bloom, a Perspective defines a certain business view or domain that can be found in the target Neo4j graph. A single Neo4j graph can be viewed through different Perspectives, each tailored for a different business purpose.
Categorization of business entities.
Property visibility and value type.
Styling (color, icon, caption).
Custom Search phrases (see later section).
A business view of the graph
Within a graph there are often multiple smaller graphs which are connected to each other. Sometimes you need to see everything. Other times it’s helpful to have a more focused view. Defining a Perspective allows you to select what parts of the graph to show and how to show them.
Let’s use the Northwind example data set. Northwind is a fictional company with a database that tracks their product catalog, sales orders, and sales staff.
When importing Northwind directly into a Neo4j graph there is a 1:1 correspondence of tables to labels, which means that for each record a node has been created with a label that matches the original name of the table. Each foreign key reference gets converted into a graph relationship.
After starting this Neo4j database and launching Bloom for the first time, Bloom automatically generates a Perspective based on the data it finds. If you have any previously defined Perspectives, they are available for selection. You can always ask Bloom to auto-generate a Perspective. The auto-generated Perspective is a good place to start. Bloom categorizes the nodes into entities, select useful captions and assign color-coding.
Keep in mind though, that when Bloom auto-generates a Perspective, a complete scan of the database is performed. If your database is large, i.e. > 10,000,000 nodes and relationships combined, this will take a long time and you can opt for a quick scan instead. See Database scans for more information. The Northwind example data set is not large and Bloom can quickly auto-generate a Perspective.
By contrast, when Bloom creates an Auto-perspective the first time you open it with a new database, it samples a node from each category it finds and use the properties in the sampled node. As with any other perspective, as you query more data, Bloom adds any new properties as they are found.
You are able to search and explore the entire Northwind graph.
While everyone in the organization could benefit from a graph view, not everyone needs to see everything. For instance, the shipping department of Northwind may only need to see orders, products, and customers. You can create another Perspective that highlights only those categories.
Similarly, you can create Perspectives that are specific to the sales department, purchasing department, or customer service department.
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