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botapi for padagraph

Introduction

Graph creation

Graphs contains nodes and edges.

Typed nodes and edges

For any graph we will create a set nodetype and edgetype

* Nodetype and edgetypes contains properties
  Each property has a name, is  typed and contains a value.  
  A `type` is not limited in properties.

  Currrently ``Text`` and ``Numeric`` types are available.

* Edges and nodes are extended form a `type`,
  and contains a value for each property defined by it's type.

Node properties

  ** a `label` property should be set for each `Node`
     This property is used as label for node in visualisation
     and is also searchable. 
     ex:  a property `label ` is of type `Text` and has a value `The Little Prince`
     
  ** `shape` is used in visualisation to render a node with a shape.
     it can have one value of `circle`, `square`, `triangle`.
     property `shape ` of type `Text`  value `circle`
        
  ** `image` is used in cards and visualisation to render a node with an image.
     the value of the property image should be a valir `url` to an image
     property `image ` of type `Text`  value `image url`

Edge properties

  ** a `label` property can be set an `edge`
     This property is used as label for edge in visualisation
     If none is set the edgetype label will be used.
     ex:  a property `label ` is of type `Text` and has a value `friend`

Exploration