Patent · US Active

Hybrid approach to collating unicode text strings consisting primarily of ASCII characters

US10325010B1 · kind B1 · utility

10Cited by

5References

20Claims

0Family size

Assignee

Tableau Software, Inc. · US

Inventors

Thomas Neumann · Munich, DE
Viktor Leis · Munich, DE
Alfons Kemper · Munich, DE

Key dates

Filing date	Sep 18, 2018
Grant date	Jun 18, 2019
Priority date	—
Expiry date	Sep 18, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH03M7/705
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Collating text strings having Unicode encoding includes receiving two text strings S=s1s2 . . . s and T=t1t2 . . . tm. When the two text strings are not identical, there is a smallest positive integer p for which the two text strings differ. The process looks up the characters sp and tp in a predefined lookup table. If either of these characters is missing from the lookup table, the collation of the text strings is determined using the standard Unicode comparison of the text strings spsp+1 . . . sn and tptp+1 . . . tm. Otherwise, the lookup table assigns weights vp and wp for the characters sp and tp. When vp≠wp, these weights define the collation order of the strings S and T. When vp=wp, the collation of S and T is determined recursively using the suffix strings sp+1 . . . sn and tp+1 . . . tm.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.