Exclusive Filter: A Term contains pattern of indefinite article pattern

• Description:
  If a term starts with pattern of "a " or "A ", it must have spelling variants co-exist in the nGram set to be a valid MWE. The spVar pattern of indefinite article are:
  • pattern-1: [a term], [a-term], [aterm]
  • pattern-2: [A term], [A-term], [Aterm]

• Examples:
  • a total
  • A total

  Also, a term starts with "a disintegrin and metalloprot" might have spVar in a varienty of form. Thus, it is an exception for this pattern. Such as:

  • a disintegrin and metalloprotease 3
  • a disintegrin and metalloprotease-3
  • A disintegrin and metalloprotease 3
  • A disintegrin and metalloprotease-3

• Input Term: core-term
• Filter Algorithm:
  • Logics:

    Description	FilterType	Notes
    Get invalid term	FT_TBD	Collect all terms that starts with: [a term], [a-term], [aterm] [A term], [A-term], [Aterm] and save to HashMap<normTerm, termSet> go through HashMap and find invalid term set Size of termSet = 1 term starts with "a " or "A " term.lc( ) does not starts with "a disintegrin and metalloprot"
    Check if invalid term set contains term	FT_INDEF_ARTICLE_PAT	filtered invalid terms

  • source code: FilterIndefArt.java
  • FilterType: FilterType.FT_INDEF_ARTICLE_PAT

• Accuracy Test on Lexicon:
  • InFile:
    • ${OUT_DATA}/03.LeadEndTerm/lexWords.data
  • Result:

    Lexicon	Filter	Sample No	Pass No	Trap No	Exp No	Pass-Rate
    2023	FT_INDEF_ARTICLE_PAT	1001867	1001844	23	0	99.9977%
    2022	FT_INDEF_ARTICLE_PAT	998845	998822	23	0	99.9977%
    2021	FT_INDEF_ARTICLE_PAT	992545	992522	23	0	99.9977%
    2020	FT_INDEF_ARTICLE_PAT	983420	983399	21	0	99.9979%
    2019	FT_INDEF_ARTICLE_PAT	972721	972702	19	0	99.9980%
    2018	FT_INDEF_ARTICLE_PAT	955564	955545	19	0	99.9980%
    2017	FT_INDEF_ARTICLE_PAT	935276	935259	17	0	99.9982%
    2016	FT_INDEF_ARTICLE_PAT	915583	915570	13	0	99.9986%
    2015	FT_INDEF_ARTICLE_PAT	896213	896200	13	0	99.9985%
    2014	FT_INDEF_ARTICLE_PAT	875090	875077	13	0	99.9985%