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@ -692,7 +692,22 @@ datatype is one of: {0}
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help=_('A dictionary of options to customize how '
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'the data in this column will be interpreted. This is a JSON '
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' string. For enumeration columns, use '
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'--display=\'{"enum_values":["val1", "val2"]}\''))
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'--display="{\\"enum_values\\":[\\"val1\\", \\"val2\\"]}"'
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'\n'
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'There are many options that can go into the display variable.'
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'The options by column type are:'
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'composite: composite_template, composite_sort, make_category,'
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' contains_html, use_decorations'
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'datetime: date_format'
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'enumeration: enum_values, enum_colors, use_decorations'
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'int, float: number_format'
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'text: is_names, use_decorations'
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'\n'
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'The best way to find legal combinations is to create a custom'
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'column of the appropriate type in the GUI then look at the'
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'backup OPF for a book (ensure that a new OPF has been created'
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'since the column was added). You will see the JSON for the'
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'"display" for the new column in the OPF.'))
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return parser
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