HELIOS PDF Handshake 2.0 User manual
10 The standard OPI workflow using PDF files
10.1 Tagging PDF files
Profile tagging is required for the color matching process. The OPI Server will need an image or document profile on the input side to perform reliable color data transformations and print colors correctly on the output device. The "Tagger" program that belongs to our EtherShare OPI product can be used to tag profile information to an image file or to a PDF document. If you are not yet familiar with the "Tagger" program, you should read chapter 7.4 of your EtherShare OPI 2.1 manual.
Start the "Tagger" from your "EtherShare Applications" volume as shown below in Fig. 44. To be on the safe side, use the Macintosh Get Info window to check the product version. You will need the current version (see "Welcome to PDF Handshake 2.0" at the beginning of this manual).
Fig. 44: Starting the "Tagger" program

Displaying tagging
information
The File menu of the "Tagger"program contains two items that are very useful to check whether a given file has already been tagged with profile information (see Fig. 45).
Fig. 45: The "Tagger" program menu

The Get Tag Info item that is highlighted in the above illustration opens the "Select file" dialog and lets you choose the file you are interested in. The file will then be displayed in the "Tagging Information Window" that is shown in Fig. 46, and you can see whether or not the file is tagged. If you choose Open Tag Info Window from the File menu, this will open an empty window and you can drag and drop several files at a time into that window. This situation is shown in Fig. 46.
Fig. 46: Entries in a "Tagging Information Window"

If a file is listed twice (in normal and italic representation) this indicates that the file has been tagged with both, an RGB and a CMYK profile. The buttons in the information window serve to either delete all entries, or save them into a text file for further usage.
If you want to create a new ICC info file, please follow the instructions given in chapter 7.4 of your OPI manual. The tagging dialog has been expanded by the PDF file format (compare Fig. 47). Other than "pure" images, such as TIFF or Photoshop files, PDF documents may contain several color spaces. Therefore, for the PDF file format, you always have to specify both, the RGB and the CMYK profile. Otherwise, if PDF files are tagged with one profile only, attempts to re-tag these files later, will fail.
Fig. 47: Setting up tagging instructions for PDF files

Please remember to use the two options Overwrite existing profiles and Update Folder Contents very carefully, because they might destroy existing profile information.
Overwrite existing profiles will induce the OPI server to apply the tagging information that are defined in this particular ICC info file to all image files or PDF documents that will later be saved in that folder - and to overwrite existing profile information, if the incoming files have any.
To apply image profile changes to PDF files, first choose None from both, the RGB and the CMYK profile pop-up menu. Then check Overwrite existing profiles and make new profile assignments for both, the RGB and CMYK profiles by choosing from the pop-up menu.
Update Folder Contents will apply the tagging information of this particular ICC info file to all files that are already located in the folder and that are not yet tagged. Be careful. Depending on the number of untagged files in the folder, this could take some time.
If you check both options and save the ICC info file, all existing files and all incoming files in that folder will be re-tagged.
Both options are unchecked by default.
10.2 About the handling of PDF files (on the OPI Server)
10.2.1 Automatic generation of layouts
Activating the generation of layouts for PDF high-resolution files requires two checked items, namely:
If you have checked both options, the OPI Server will automatically generate layouts for all PDF files that are saved on the specific volume on your server. The settings in the OPI Server Settings dialog will then be valid for PDF files as well (e.g. layout resolution, layout name, etc.). See chapter 6.3 of your EtherShare OPI 2.1 documentation for details.
By default, the file format of the PDF layout representations will be EPSF for composite PDF files and DCS for pre-separated PDF files. .
The OPI Server uses one page only for the generation of layouts - it uses the first page of the PDF document. If you have a multi-page document and want to have layouts from several pages, you can use our "pdfcat" tool to split your document into several single-page files. Remember that automatic layout generation does not work for files that have been created by "pdfcat". More information is given in chapter 6 "Exploding/concatenating files using "pdfcat"".
PDF files may contain several images, illustrations and text on one page, meaning that the pages could become very complex. Depending on the hold time you have set and on how complex the given PDF files are, the generation of layouts can take some time (in some cases more than a minute).
10.2.2 Resolving OPI comments in PDF files
PDF files can already contain OPI comments. For example, if you design a FreeHand document, import some layout images (by reference) into this document, and then print into a PostScript file, the resulting PostScript file will contain as OPI comments the references to the high-resolution images. The OPI comments can be preserved - depending on the Acrobat Distiller job options you define (compare appendix A 1: "Creating PDF files using Acrobat Distiller").
Whenever OPI comments are included in a PDF file, the OPI Server is able to resolve these comments. That means that if you place an EPSF layout file (generated from a PDF original) into a layout application and then print your new document, image replacement will possibly be performed twice: the OPI Server replaces the EPSF layout in your document by the PDF original and replaces the layout files in the PDF document by the respective originals. An example is given in Fig. 48 below.

Note: In the PDF Handshake Acrobat plug-in and "pdfprint" program there are options to switch off OPI image replacement. See -o noopi in chapter 9.1 "Printing PDF files using "pdfprint"" and 10.2 "About the handling of PDF files (on the OPI Server)".

In the situation illustrated below, color matching will also be performed on two different layers. All objects of "Doc1.pdf" that will not be replaced again, will be matched according to the profiles R1 and C1 - depending on the color space of the respective object. The files A and B will be matched according to the image profiles that are tagged to the high-resolution originals (here: profiles R2 and R3).
Fig. 48: Resolving OPI comments in PDF high-res files

In certain situations, the resolving of OPI comments in PDF documents can cause problems, especially if you send your PDF documents to another production site. In that case - if the PDF document contains layout images and OPI comments pointing to the originals - you have to make sure that you also send these originals and all the profiles you need. Sometimes, it could be wiser to embed everything in the PDF file and switch off the option Preserve OPI Comments in the Distiller (see also appendix A 1: "Creating PDF files using Acrobat Distiller").
10.2.3 Pre-separated PDF files and EtherShare OPI
Pre-separated PDF documents are recognized by EtherShare OPI. They are handled as follows:
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