Beatriz RecinosA flag indicating whether an id match is allow, is added to the data frames by
(see link to script to be inserted).
Generic id's (e.g. blank, "SHIP",
"MASKSTID") are allowed to match within a dck.
Match criteria
The following table contains the information used to decide whether id's in a pair, are an allowed match.
These criteria have been developed by inspection of the paired id's and are therefore likely to be approximate.
Damerau–Levenshtein (DL) distance is the number of insertions, deletions and swaps necessary to convert one string to another.
A substring is where one id is contained within the other.
Italics in the table below represents the "id type".
Matches of reports where the id's meet the criteria listed below are allow.
| DCK | ID |
|---|---|
Within any dck
|
blank, SHIP, MASKSTID |
| 116, 117, 218 | any id to blank |
| 150, 151, 152, 155, 156, 192, 193, 215, 720, 901 | any id to blank |
| 128, 254, 720 | any id to blank |
| 187, 196, 197, 229, 230, 720, 732 | any id to blank |
| 227, 246, 732 | any id to blank |
| 761, 898 | any id to blank |
| 204, 245 | any id to blank |
| 230, 254 | any id to blank |
| 128, 230 | any id to blank |
| 195, 281 | any id to blank |
| 192, 193, 194, 201, 202, 706, 732 | any id to blank |
| 194, 201, 202, 203, 207, 221, 223, 227, 233, 239, 254, 926 | substring; or 1 digit dck 194 id
|
| 254, 926 | 2-5 characters of 254 match 3-6 characters of 926 |
| 194, 927 | "7- " in 194 with "00" in 227 |
| 194 with 207 or 227 | 3-6 characters of 194 match 2-5 characters of 207 or 227 |
| 194 with 194, 201, 202, 203, 207, 227 | DL = 1 or substring of length at least 3 and number of occurrences of one of the id's = 1 |
| 194 with 201, 203, 207, 227 | substring |
| 194, 201 | DL <= 2 and one of the id's classed as invalid |
| 184, 209 | characters 5-8 of 184 with 2-5 or 209 |
| 555, 733 | add "N" at start of 555 match of characters 2-4 555 id is SHIP |
| 733 with 849, 888 | 849, 888 id is SHIP |
| 733 with 888, 892 | 888, 892 id has DL <= 1 with ROBB 888, 892 id is EMIO, UYAJ, UFRE |
| 186, 733 | 186 has 4 digit id, 733 is north_pole_station
|
| 750, 888 | 888 id is SHIP |
| 781 with 128, 735, 849, 888, 926, 927 | 781 is AAAA with callsign |
| 927 with 230, 720 | 927 id is SHIP |
| 213, 902 | 213 is characters 4-8 of 902 |
| 926 with 888, 892 | 888, 892 is characters 4-8 of 926 |
| 892, 926 | 892 is characters 1-4 of 926 |
| 117 | any match to invalid id
|
| 116, 117 |
id_over_X to id_minus, match of characters 2-4 characters 3-4 of 116 with 117 and 116 is osv_onstation match of characters 1-3 and 116 is osv_onstation match characters 2-3 of 116 with 1-2 of 117 and 116 is osv_noship match of characters 1-4 and 116 is other match of - at start of 116 with 5 at start of 117 prepend 5 to 117 prepend - to 116 1 digit id in each match of start of 116 with 2 character 117 within or between 116 and 117 when DL <=2 when one id has 3 or fewer occurrences 116 missing to extant 117 116 is osv_onstation and characters 3-4 are 00 with 117 id of length 4 substring, one id has <= 4 occurrences, the other >= 10 occurrences |
| 117 | prepend "-" to one of the id's DL = 1 if 3 or fewer occurrences of one id
|
| 116, 116 | 22014, 22004 |
| 116, 226 | osv_noship to ows_logbook |
| 117, 218 | prepend 0 to 117 and 218 is us_ows_folio characters 1-3 of 117 with 2-4 of 218 is us_ows_folio |
| 117, 128 | both 4 characters in length and match of characters 1-2 in 117 with 3-4 in 128 |
| 192, 215, 720 | match blank id match characters 1-4 with 4 character id allow letter as 5th character in 192 in 8 character id one id invalid and not id_5digit_pership and not containing 0000 and DL<=2 or substring DL<=2 and one id has <= 3 occurrences and other has >= 8 |
| 192, 215, 254, 720 | one is 5 character id, the other is not |
| 246 | "PQP PTMNI" to "PORQUOIP" |
| 762 | 2617A to 26174 |
| 128, 233, 254, 255, 555, 700, 708, 709, 732, 735, 749, 781, 792 ,849, 874, 875, 888, 889, 892, 926, 927, 992, 993, 995, 999hereafter "call.dcks" | subset one is invalid and DL <= 2 DL <= 2 and one has a single occurrence and the other at least 3 one has a single occurrence and the other at least 20 |
| call.dcks, 850 | SHIP, MASKSTID or AAAA to anything |
| call.dcks, 896 | SHIP to OWS |
| 128, 555 | 128 platform type = 3 and 555 id starts 4Y |
| 128, 230 with 555 | ship number to call sign if at least 3 occurrences |
| 128, 230 with 555, 720 | matches with blank id
|
| Any | match when 0 replaced with O; 0/O I/J UU/VV U/V with DL=1 WZC/WCZ |
| 892, 896 | replace C7O/C7 MQR/C7R |
| 992 | replace XP42/MP42 |
| 700 with 792, 992 | BBXX removed from start of id
|
| 711, 201 | > 3 occurrences |
| 720, 734 | > 3 occurrences |
| 246, 720 | TERRANOVA to id starting 610426 |
| 193 with 705, 706, 707 | 705, 706, 707 starting NL or DN |
| 118, 762 with 705, 706, 707 | 705, 706, 707 starting JP |
| 203 with 705, 706, 707 | 705, 706, 707 starting UK |
| 705, 706, 707 | with matching characters 1-2 of original id
|
| 703, 927 | 927 id starts 05 and has >=5 occurrences |