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<[email protected]> |
Author: Alexander Barkov
Email: [email protected]
Message:
> I don't know if that works as designed or unintentionally:
>
> With an UDM_MATCH_SUBSTR word match records having a subtring as a whole word will get a lower score than records having words containing the substring.
mnoGoSearch does not distinguish between full and substring
matches when UDM_MATCH_SUBSTR is specified. So both generate
the same score.
The difference most likely comes from some other document
parameters, such as word density, document size, and so on.
Have a look here to see the list of parameters affecting score:
http://www.mnogosearch.org/doc33/msearch-rel.html#score-commands
>
> I.e.:
> The body section of record1 contains the word "Wochentage".
> The body section of record2 contains the word "Woche".
>
> When I start a search query with "Woche" record1 will get a higher score than record2.
> The difference is very small (0.0X %) but I would expect that record2 has a slightly significant higher score than record1.
>
> I've done a lot of tests and the same thing happens with other records and with other words/substrings. All strings I used in the tests hadn't synonym words.
>
> Here's the param set I use (only relevant params):
>
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_WORD_MATCH, UDM_MATCH_SUBSTR);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'SubstringMatchMinWordLength', '2');
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'WordDensityFactor', 5);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'StrictModeThreshold', '1');
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'IspellUsePrefixes', 'yes');
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'WordFormFactor', 0);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'MinWordLength', 2);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'MaxWordLength', 64);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'DateFactor', 0);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_SEARCH_MODE, UDM_MODE_ALL);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'IDFFactor', '40');
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_DETECT_CLONES, UDM_DISABLED);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_PHRASE_MODE, UDM_ENABLED);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'PopRankUseShowCnt', 'no');
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'ExcerptSize', 384);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'ExcerptPadding', 20);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_GROUPBYSITE, UDM_DISABLED);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_MIN_WORD_LEN, 2);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_MAX_WORD_LEN, 64);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_WEIGHT_FACTOR, "00F8");
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'nwf', "0000");
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'MinCoordFactor', 0);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'NumWordFactor', 10);
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'DocSizeWeight', 0);
> $res = Udm_Set_Agent_Param($udmAgent, UDM_PARAM_SORT_ORDER, 'R');
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'suggest', 'yes');
> $res = Udm_Set_Agent_Param_Ex($udmAgent, 'sp', '1');
>
> WordFormFactor on the other side works great for original/fuzzy word forms.
>
Reply: <http://www.mnogosearch.org/board/message.php?id=21077>