You configure Endeca records and properties in a file named index-config.json. A version of index-config.json is provided with the Discover Electronics reference application in the installation-directory\Discover\config\index_config folder. You can edit this version as required by your application.

The index-config.json file consists of a series of attributes, each of which specifies either a dimension or a property, depending on the value of the attribute's "jcr:primaryType" parameter (either "endeca:dimension", "endeca:property", or "endeca:derivedProperty").

The attributes have various parameters, such as propertyDataType, displayOrder, isAutoGen. For information about these and other supported parameters, see Parameters of dimensions and properties in index-config.json .

The following excerpt from the index-config.json file provided with the Discover Electronics application illustrates attributes that configure properties or dimensions:

{
  "indexConfig" : {
    "system" : {
      "attributes" : {    
        "camera.operating_temperature_range_t-t" : {
          "propertyDataType" : "ALPHA",
          "jcr:primaryType" : "endeca:property",
          "sourcePropertyNames" : [ "camera.Operating temperature range (T-T)" ]
          },
        "product.min_price" : {                    
          "derivedPropertyFunction" : "MIN",
          "jcr:primaryType" : "endeca:derivedProperty",
          "derivedPropertySource" : "product.price"
          },
        "camera.video_capability" : {
          "displayOrder" : 7,
          "jcr:primaryType" : "endeca:dimension",
          "isAutogen" : true,
          "sourcePropertyNames" : [ "camera.Video capability" ]
          }, 
        "camera.megapixel_range" : {
          "displayOrder" : 16,
          "jcr:primaryType" : "endeca:dimension",
          "rangeComparisonType" : "FLOAT",
          "sourcePropertyNames" : [ "camera.Megapixel" ]
          },

           . . .

This excerpt configures:

For example, suppose that source data records in your product data record store have the following properties:

camera.sensor_megapixels
camera.lens_focal_length
camera_type
camera_weight

You want to produce Endeca records that have the following simplified names for these properties, omitting the property for the camera's weight:

megapixels
focal length 
type

To map these source record properties to Endeca properties, add the following attributes to index-config.json:

"megapixels" : { 
   "propertyDataType" : "ALPHA", 
   "jcr:primaryType" : "endeca:property", 
   "sourcePropertyNames" : [ "camera.sensor_megapixels" ] 
}, 

"focal length" : {
   "propertyDataType" : "ALPHA", 
   "jcr:primaryType" : "endeca:property",
   "sourcePropertyNames" : [ "camera.lens_focal_length" ] 
}, 

"type" : { 
   "propertyDataType" :	"ALPHA", 
   "jcr:primaryType" : "endeca:property", 
   "sourcePropertyNames" : [	"camera_type" ] 
}, 	 

Given this property mapping, indexing a source data record with the following properties and property values:

camera.sensor_megapixels: 24.2 
camera.lens_focal_length: 18-55mm 
camera_type: digital 
camera_weight: 450g

will produce an Endeca record with the following properties and property values:

megapixels: 24.2
focal length: 18-55mm  
type: digital