Version a CloudFormation template

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Any suggestions to version the CloudFormation template? I suggested to use the description field:

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "4.5.180 - General Platform Resources",
  "Metadata" : {
  },
  "Parameters" : {
    "PlatformParameter" : {
        "Type" : "String",
        "Description" : "Platform Environment"
    },
    "VPCId" : {
      "Type" : "String",
      "Description" : "Select Platform to Deploy to."
    },
    "DBDataTierA" : {
      "Type" : "String",
      "Description" : "AZ A - Web Tier"
    },
    "DBDataTierB" : {
      "Type" : "String",
      "Description" : "AZ B - Web Tier"
    }
  },