{// Union field one_expression can be only one of the following:"lowerCase": {object (CaseExpression)},"upperCase": {object (CaseExpression)},"concatenate": {object (ConcatenateExpression)}// End of list of possible types for union field one_expression.}
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2026-04-24 (世界標準時間)。"],[],["This document outlines the structure and usage of dimensions in data reporting, focusing on creating custom dimensions. Dimensions are data attributes, like \"city.\" You can define a `dimension` with a `name` and an optional `dimensionExpression`. `DimensionExpression` allows combining or modifying existing dimensions using `lowerCase`, `upperCase`, or `concatenate` functions. `CaseExpression` changes dimension cases. `ConcatenateExpression` merges dimension values with a specified `delimiter`. Each dimension name is a string with allowed characters.\n"]]