Core Library

The Core library is loaded with Platform.Load("core", "1.1.5") and gives you access to a set of powerful object-oriented namespaces. Unlike Platform.Function.*, Core library objects use a more JavaScript-idiomatic dot-notation with method chaining.

You must call Platform.Load("core", "1.1.5") before using any Core library object. Place it at the very top of your first <script runat="server"> block.

Platform.Load("core", "1.1.5");

Core Library Objects

Object	Description
`Account`	Account settings
`AccountUser`	Users in the business unit
`ContentAreaObj`	Classic Content Areas (deprecated object — not `ContentArea()` global)
`DataExtension`	Initialize and work with Data Extensions
`DataExtension.Fields`	Field definitions on a DE
`DataExtension.Rows`	Retrieve, Add, Update, Remove rows
`DeliveryProfile`	Delivery profiles
`Email`	Email message definitions
`FilterDefinition`	Data filters
`Folder`	Content folders
`List`	Work with publication lists
`List.Subscribers`	Subscribers on a specific list
`Portfolio`	Portfolio (file) assets
`QueryDefinition`	SQL query activities
`Send`	Email sends
`Send.Definition`	Send Definition configurations
`SendClassification`	Send classifications
`SenderProfile`	Sender profiles
`Subscriber`	Manage All Subscribers list entries
`Template`	Email templates
`TriggeredSend`	Triggered send definitions and sends

HTTP utilities are also part of the Core library but documented separately:

Object	Description
`HTTP.GET`	Simple HTTP GET
`HTTP.POST`	Simple HTTP POST

Tracking events

SOAP-style tracking event objects expose Retrieve(filter) for send metrics:

Object	Page
`BounceEvent`	Bounce events
`ClickEvent`	Click events
`ForwardedEmailEvent`	Forwarded email events
`ForwardedEmailOptInEvent`	Forwarded opt-in events
`NotSentEvent`	Not-sent events
`OpenEvent`	Open events
`SentEvent`	Sent events
`SurveyEvent`	Survey events
`UnsubEvent`	Unsubscribe events

See Tracking events for full documentation on every type.

When to Use Core vs Platform.Function

The Core library and Platform.Function.* both interact with SFMC data, but have different strengths:

	Core Library	Platform.Function
DE operations	Object-based (Init → Rows.Retrieve)	Functional (Lookup, InsertData)
Subscriber	Rich object model	No direct equivalent
Performance (large datasets)	Better for bulk	Better for single lookups
CloudPage retrieve	Works correctly	`DataExtension.Rows.Retrieve()` bug
Error handling	Exceptions on failure	Returns 0/null

See Platform.Function vs Core Library for a detailed comparison.