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A flag indicating whether an `id` match is allow, is added to the data frames by
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(see [link to script to be inserted]()).
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A flag indicating whether an `id` match is allow, is added to the data frames by [INSERT-LINK-TO-SCRIPT](). Matches of reports where the `id`'s meet the criteria listed in the table below are allow.
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Generic `id`'s (e.g. blank, "SHIP",
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"MASKSTID") are allowed to match within a `dck`.
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**Match criteria**
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----------------
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The following table contains the information used to decide whether `id`'s in a pair, are an allowed match.
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These criteria have been developed by inspection of the paired `id`'s and are therefore likely to be approximate.
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[Damerau–Levenshtein (DL) distance](https://en.wikipedia.org/wiki/Damerau%E2%80%93Levenshtein_distance) is the
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number of insertions, deletions and swaps necessary to convert one string to another.
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A substring is where one `id` is contained within the other.
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*Italics* in the table below represents the "`id` type".
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number of insertions, deletions and swaps necessary to convert one string to another. A substring is where one `id` is contained within the other.
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Matches of reports where the `id`'s meet the criteria listed below are allow.
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*Italics* in the table below represents the *"`id` type"*.
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________________
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DCK | ID
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... | ... | |