Add support for array-based properties on nodes and edges.

[Vince Bickers]

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[Vince Bickers]

CSV files don't have the concept of an array-field, but it is possible for a set of fields to be considered elements of an array. For example, a table of RGB colours, with the first column is the colour name, and the following 3 are the colours values in terms of red, green and blue. It should be possible to create an array from the colours and store it on a single array property in the graph.

[Vince Bickers]

We won't initially support the idea of a set of values being distributed across different fields, but it should be easy to support converting a single multi-valued field to a property array. Consider a field vegetables with the following value

"carrots, peas, beans"

This would ordinarlly be stored as a single string-property in the graph. To convert to an array property, the descriptor for this field in the schema could define a split conversion:

{"name":"vegetables", "conversion":"split:," }

Here the argument to split , is the delimiter.

[Vince Bickers]

Use a "split" converter.