https://community.graphisoft.com/t5/Libraries-objects/Input-data-from-text-file-narrow-down-in-object/m-p/282577#M3908 There are several way to input from/output to files in GDL. You should check the GDL Reference Guide. You can work with TXT files, "Data Files" (you define the format in the file, but basically a text file), XML files.<BR /> After you input that data you can work with array and I guess you can narrow down the array into another array that contains only those items that fulfill your criteria. Sun, 15 Apr 2018 20:56:51 GMT Laszlo Nagy 2018-04-15T20:56:51Z https://community.graphisoft.com/t5/Libraries-objects/Input-data-from-text-file-narrow-down-in-object/m-p/282576#M3907 <DIV class="actalk-migrated-content"><T>Hello,<BR /> <BR /> I am trying to work the best way of inputting data from a text file and then being able to narrow the list down within the object. <BR /> <BR /> Thanks</T></DIV> Wed, 11 Apr 2018 11:40:45 GMT https://community.graphisoft.com/t5/Libraries-objects/Input-data-from-text-file-narrow-down-in-object/m-p/282576#M3907 JGoode 2018-04-11T11:40:45Z https://community.graphisoft.com/t5/Libraries-objects/Input-data-from-text-file-narrow-down-in-object/m-p/282577#M3908 There are several way to input from/output to files in GDL. You should check the GDL Reference Guide. You can work with TXT files, "Data Files" (you define the format in the file, but basically a text file), XML files.<BR /> After you input that data you can work with array and I guess you can narrow down the array into another array that contains only those items that fulfill your criteria. Sun, 15 Apr 2018 20:56:51 GMT https://community.graphisoft.com/t5/Libraries-objects/Input-data-from-text-file-narrow-down-in-object/m-p/282577#M3908 Laszlo Nagy 2018-04-15T20:56:51Z