Comparison of TF2 WebAPI and Steam Inventory API results

Comparison between TF2 WebAPI and Steam Inventory API results for a unique Your
Eternal Reward in an F2P backpack. Comments added by me indicated by a #.

================================================================================

TF2 WebAPI:

{
    "id": 10042989175,
    "original_id": 10042989175,
    "defindex": 225,            # ID of Your Eternal Reward in TF2 item schema
    "level": 1,
    "quality": 6,               # 6 means Unique
    "inventory": 2147483675,    # specifies position in backpack
    "quantity": 1,
    "origin": 0,                # 0 means Timed Drop
    "equipped": [               # Player has this equipped in loadout
        {
            "class": 8,
            "slot": 2
        }
    ],
    "attributes": [
        {
            "defindex": 796,    # Viewmodel offset when using minmode
            "value": "5 0 -4"
        },
        {
            "defindex": 154,    # "disguise on backstab"
            "value": 1065353216,
            "float_value": 1
        },
        {
            "defindex": 156,    # "silent killer"
            "value": 1065353216,
            "float_value": 1
        },
        {
            "defindex": 144,    # "lunchbox adds minicrits" (???)
            "value": 1065353216,
            "float_value": 1
        },
        {
            "defindex": 551,    # "special taunt"
            "value": 1065353216,
            "float_value": 1
        },
        {
            "defindex": 34,     # increased cloak drain rate
            "value": 1068121457,
            "float_value": 1.3300000429153442
        },
        {
            "defindex": 816,    # disguise requires a full cloak meter
            "value": 1065353216,
            "float_value": 1
        }
    ]
},

================================================================================

Steam Inventory API result is actually returned in two parts. First part is very
short, second part has the rest of the information. This is because fetching
part 2 is optional, in case for whatever reason an application only needs item
IDs and not much else.

Part 1:

{
    "appid": 440,
    "contextid": "2",
    "assetid": "10042989175",       # same as "id" in TF2 WebAPI
    "classid": "156",               # specifies Your Eternal Reward ?
    "instanceid": "23967790",       # not sure, but together with classid this specifies the item description in part 2
    "amount": "1"
},

Part 2:

{
    "appid": 440,
    "classid": "156",
    "instanceid": "23967790",
    "currency": 0,
    "background_color": "3C352E",
    "icon_url": "fWFc82js0fmoRAP-qOIPu5THSWqfSmTELLqcUywGkijVjZULUrsm1j-9xgEIUwIFWAnsuTR8ms3xDOCIN-wBid0wq8INjWQ9lwMoNbq3aTQzcQfGU6EOCaI_rQm_UHFlupY6A4Hvoe1XfAnx9NyR6XUuLuY",
    "icon_url_large": "fWFc82js0fmoRAP-qOIPu5THSWqfSmTELLqcUywGkijVjZULUrsm1j-9xgEIUwIFWAnsuTR8ms3xDOCIN-wBid0wq8INjWQ9lwMoNbq3aTQzcQfGU6EOCaI_rQm_UHFlupY6A4Hvoe1XfAnx9NyR6XUuLuY",
    "descriptions": [
        {
            "value": "Upon a successful backstab against a human target, you rapidly disguise as your victim",
            "color": "7ea9d1"
        },
        {
            "value": "Silent Killer: No attack noise from backstabs",
            "color": "7ea9d1"
        },
        {
            "value": "+33% cloak drain rate",
            "color": "d83636"
        },
        {
            "value": "Normal disguises require (and consume) a full cloak meter",
            "color": "d83636"
        },
        {
            "value": " "
        },
        {
            "value": "The Saharan Spy",
            "color": "e1e10f"
        },
        {
            "value": " "
        },
        {
            "value": "L'Etranger",
            "color": "8b8989"
        },
        {
            "value": "Your Eternal Reward",
            "color": "8b8989"
        },
        {
            "value": "Familiar Fez",
            "color": "8b8989"
        },
        {
            "value": " "
        },
        {
            "value": "Item Set Bonus:",
            "color": "e1e10f"
        },
        {
            "value": "Extra effects when taunting",
            "color": "8b8989"
        },
        {
            "value": " "
        },
        {
            "value": "( Not Tradable or Marketable )"
        }
    ],
    "tradable": 0,                          # not tradable!
    "actions": [
        {
            "link": "http://wiki.teamfortress.com/scripts/itemredirect.php?id=225&lang=en_US",
            "name": "Item Wiki Page..."
        }
    ],
    "name": "Your Eternal Reward",
    "name_color": "7D6D00",
    "type": "Level 1 Knife",
    "market_name": "Your Eternal Reward",
    "market_hash_name": "Your Eternal Reward",
    "commodity": 0,
    "market_tradable_restriction": 7,
    "market_marketable_restriction": 0,
    "marketable": 0,
    "tags": [                               # this seems to be where any game-specific information has to be put
        {
            "category": "Quality",
            "internal_name": "Unique",
            "localized_category_name": "Quality",
            "localized_tag_name": "Unique",
            "color": "7D6D00"
        },
        {
            "category": "Type",
            "internal_name": "melee",
            "localized_category_name": "Type",
            "localized_tag_name": "Melee weapon"
        },
        {
            "category": "Class",
            "internal_name": "Spy",
            "localized_category_name": "Class",
            "localized_tag_name": "Spy"
        }
    ]
},