Reserved words in events, forms, items, functions, and variables

To avoid data conflicts, there are some reserved words that you need to avoid when naming forms, items, functions, and variables in Viedoc. Such a conflict can occur, for example, when executing functions in Viedoc, when exporting data from Viedoc, or when analyzing your data in SAS, and it might lead to unwanted behavior or even errors.

Forms and items

The following are Viedoc's internal JavaScript functions, so they should not be used as form or item OIDs:

Note! There is a set of reserved words for the SAS macro facility. If you intend to use that facility, avoid these words in your Viedoc forms and item identifiers.

Form identifiers

Avoid these words in form names:

* or any other medical coding dictionary name, such as MedDRA or ATC

Note! If you need to analyze your data using SAS, there are some reserved words that you need to avoid in your Viedoc form identifiers. These identifiers are used as data set names in SAS.

Items

Avoid the following when naming items:

Note!

• When exporting data from Viedoc to Excel or CSV format, Viedoc automatically creates extra fields for the codes in all code list items. The field identifiers are created by appending CD to the original item name. Therefore, it is not recommended to give your Viedoc items IDs ending with CD.
• Data for code list items, for example radio buttons, drop-down menus, and checkboxes, have an applied format when exported to SAS. Thus, when naming code list IDs, values, and formats, it is important to follow the SAS conventions for format naming. For example, none of these should contain values with dashes.
• watch is a reserved word, using this in a form for example labels or IDs, or for the internal design description as a stand-alone word will result in an exported annotated/blank CRF which does not contain any form elements. However, if using the label watch as part of a longer text, or using Watch (with the initial letter caplitalized), the exported annotated/blank CRF will contain the form elements.
• If you are using SAS for data analysis, checkboxes in Viedoc should not have options with negative code list values (for example -1). Viedoc converts the options for checkboxes into variable names for SAS, and SAS does not allow dashes in variable names.

Items and functions

Avoid using JavaScript keywords in item IDs and functions.

Item OIDs and variable names in functions

Do not use the following as item OIDs or as variable names in functions:

Events, forms, and items

Avoid the following when naming events, forms, and items:

Limits to ID names

When naming IDs and labels, the following limits apply:

Windows naming conventions

In Microsoft Windows, there is a number of reserved file names. Do not use them as dataset names in Viedoc as they could create issues when attempting to open them in Windows or SAS.

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