7.4

Capture Fields Generator
The Capture Fields Generator Action Task is used to generate Capture patterns in your job, which will then be printed for use
with an Anoto Digital Pen. It also interacts with the Capture database and does some operations.
PlanetPress Capture Fields cannot simply be inserted into an existing document as-is and expected to work properly,
efficiently or consistently. In order to design a document with Capture Fields, you must review and understand the
Critical PlanetPress Capture Implementation Restrictions.
Input
The Capture Field Generator Action Task expects to receive a regular data file that corresponds to the Capture-Ready doc-
ument that uses it, along with Metadata generated using the same data file and document. This means that this task must be
preceded by at least the Create Metadata task.
This metadata must also be correctly separated at the Documents level, either in the Capture-Ready document's properties or
through the Metadata Level Creator.
You may also use a Metadata Sequencer in order to split the job into multiple parts. This both creates multiple smaller outputs,
as well as multiple smaller PDFs in the Capture Database. While it is not recommended to separate each document on its own
as it removes all optimization and makes the database much larger, you may split into document batches such as 250, 1000 or
2500 documents.
If using the Metadata Sequencer it is generally recommended to place the Sequencer and the Capture Field Generator tasks
within a branch and, within the Capture Field Generator's On Error properties tab, to set it to stop the branch if any errors
occur. This is to ensure that if such an error occurs most of your document sequences will get generated and you will not have
to start the job over from the beginning.
Processing
The Capture Fields Generator Action Task uses an existing PlanetPress Design document containing Capture Fields and
assigns a unique Capture Pattern to each printed page. The task then locks each pattern that it used so it cannot be reassigned
to any other document.
The whole job is then converted into a PDFfile which is stored, without the patterns, in the Capture Database. This PDFfile is
later used by the Capture Fields Processor to be merged with ink from the pen. At the same time the output is generated,
either as a PDF(including the patterns)or an Optimized PostScript Stream file. This means that regardless of the output, a
PDFis always generated in the database.
If any error occurs during processing, such as running out of patterns while generating the job, every action made by
this task will be rolled back as if they hadn't happened.
Output
The Capture field Generator action Task will output either a PDFand Metadata, or an Optimized PostScript Stream file without
Metadata.
Properties
Pattern Generator action task properties are as follows:
l Capture Document: Choose the PlanetPress Design capture ready document that will be used to generate the out-
put including the capture fields.