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PDF Table Parsing in Mandarin
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=== 6. 表頭、註解與資料列應分階段辨識 === PDF 表格經常包含表頭、單位說明、註解、小計、總計、頁尾或空白列。如果解析器將所有含有文字的列都視為資料列,就很容易產生錯誤紀錄。 建議將解析流程分成下列階段: # 等待表頭關鍵字出現。 # 辨識表頭區域與欄名。 # 判斷資料列的起始位置。 # 處理一般資料列。 # 處理跨頁接續內容。 # 排除註解、單位說明、小計、總計與頁尾。 # 輸出標準化紀錄。 缺漏欄位可以填入 <code>null</code>。但如果欄位已經偏移,解析器就不能直接依壓縮後陣列的順序套用表格結構定義,否則可能造成整列資料錯置。
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