10.Solutions


  1. The output of the program is:
1
2
3
  1. The code in your program should look like:
fun main() {

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An identifier:  productId A product name:  productName A selling cost for the consumer:  price An optional set of tags:  tags . For example: { "productId" : 1 , "productName" : "A green door" , "price" : 12.50 , "tags" : [ "home" , "green" ] } While generally straightforward, the example leaves some open questions. Here are just a few of them: What is  productId ? Is  productName  required? Can the  price  be zero (0)? Are all of the  tags  string values? When you’re talking about a data format, you want to have metadata about what keys mean, including the valid inputs for those keys.  JSON Schema  is a proposed IETF standard how to answer those questions for data. Yes. the standard uses a JSON data document to describe data documents, most often that are also JSON data documents but could be in any number of other content types like  text/xml . The  $schema  keyword states that this sch...
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