Declare sources and their schema.
Define the records a source exposes, the connection it uses, and how those records map to your objects. Credentials and transport remain with the host.
Connect declared sources, give their records business meaning, and make the data behind each operation inspectable.
Compare a published captured version with an external read. Their freshness and history mean different things.
Customer: Meridian Components
Amount: $2,500.00
Status: approved
Sample observation metadata. Source placement is declared in the product; a caller cannot switch a production source by toggling this control.
Define the records a source exposes, the connection it uses, and how those records map to your objects. Credentials and transport remain with the host.
Captured sources publish immutable dataset transactions. Depending on the connector, capture can use snapshots, append-only cursors, PostgreSQL CDC, or authenticated streams.
A published capture identifies the data version behind a read. An external read records its own observation interval and consistency. Show those facts beside the result.
Functions declare source dependencies. Actions can bind prepared evidence and a maximum observation age, then check its applicability again before committing.
An exact excerpt from the repository, with the complete source file available to inspect and download.
// VirtualConnection returns the one external execution context for the entire// relation set. Mixing physical stores is an explicit unsupported plan, never// a reason to scan or materialize another source implicitly.func (r *Registry) VirtualConnection(datasets []string) (*ConnectionSpec, bool, error) { var selected *ConnectionSpec var captured bool for _, name := range datasets { d, ok := r.Dataset(name) if !ok { return nil, false, fmt.Errorf("source dataset %s does not exist", name) } if !d.IsVirtual { captured = true continue } connection, ok := r.Connection(d.Connection) if !ok { return nil, true, fmt.Errorf("virtual source connection is unavailable") } if selected != nil && selected.Name != connection.Name { return nil, true, BadRequest("cross-source virtual queries are unsupported") } selected = connection } if selected != nil && captured { return nil, true, BadRequest("joining captured and virtual sources is unsupported") } return selected, selected != nil, nil} A captured publication does not imply that independent sources were observed at the same instant. Virtual reads have no captured history or universal cross-source query guarantee. Capture strategies and supported operations depend on the connector.
Read the capability referenceA business process, the systems it touches, and the rules it needs to follow.