Object model

Script restrictions and object model for Custom activity scripting in ABBYY Vantage.

This page describes restrictions on Custom activity scripts and lists the objects and enumerators available in Vantage’s JavaScript environment.

Script restrictions

Vantage’s JavaScript interpreter supports ECMAScript 5.1 and selected later features. For more information, see the Jint ECMAScript features.

Scripts can define custom functions, access Vantage data catalogs through the Context interface, and send requests to external services through the Context interface.

Scripts cannot:

• Send requests to databases other than Vantage data catalogs.
• Use third-party libraries such as jQuery.

Custom scripts are subject to memory, runtime, command-count, and recursion-depth limits to prevent runaway scripts. If a script exceeds any limit, processing is interrupted with an error. Defaults are set by your server administrator — current defaults:

Restriction	Default limit
Memory	500 MB
Script runtime	600 seconds × total number of document pages in a transaction
Expressions	1,000,000 × total number of document pages in a transaction
Maximum recursion depth	100
Maximum array size	50,000
Maximum HTTP requests	200 × total number of document pages in a transaction

Error handling

• If a syntax error is detected in the script, the Custom activity transaction is interrupted. The error is visible in Skill Monitor.
• If an exception is thrown while the script runs, both the script and the transaction are interrupted. The error is visible in Skill Monitor.
• If a program exception is caught with try/catch, error handling is whatever your script does.

Errors caused by exceeding script restrictions are not intercepted. In these cases, both the script and the transaction are interrupted.

Object reference

Execution context

• Context
• Transaction
• Parameter

Documents and fields

• Document
• Field
• Page
• Region
• Rectangle
• BinaryFile
• DocumentExportResult

Classification and validation

• ClassConfidenceModel
• RuleError

HTTP

• HttpRequest
• MultipartFormDataRequest

Enumerators

• DataType
• FieldOcrType
• ExportFormat
• ContentEncoding

Deprecated interfaces and enumerators

Deprecated	Replacement
InputData	Transaction.Documents
OutputData	Transaction.Documents
ExtractedData	Document
ExtractedField	Field
FieldType	FieldOcrType

Related topics

• Custom activity
• Sample scripts
• Context