Extend readme

README.md

@@ -9,11 +9,34 @@ lists can henceforth be matched using the web UI. The tool will
 finally generate the necessary lines of code to register the
 relevant terms in the concordance lists.
 
+Good to know
+------------
+
+### Handling table-based imports
+
+If all entries of a given type are currently in a table column
+- e.g. of a CSV file - just open the file in a spreadsheet editor
+and select the column contents to copy and paste them over to
+the text area of the concordance checker.
+
+### XML-based imports
+
+Here, [XPath](https://en.wikipedia.org/wiki/XPath) may be helpful.
+Different programs support the use of XPath from the command line.
+A useful one-liner to select the value of all elements of the name
+`OkuFunktionS` using [xmlstarlet](https://en.wikipedia.org/wiki/XMLStarlet)
+and filter out duplicate entries is, e.g.:
+
+```
+xmlstarlet sel -t -v "//OkuFunktionS" Obj_Kuenstler.xml   | sort | awk '!seen[$0]++'
+```
+
 See also
 --------
 
 - [Repository for concordance lists](https://gitea.armuli.eu/museum-digital/MDImporterConcordanceLists)
 - [Repository for museum-digital's controlled lists](https://gitea.armuli.eu/museum-digital/MDAllowedValueSets)
+- [md:quality: Quality checker built upon museum-digital's import tools. Unmatched entries will stop the quality checks.](https://quality.museum-digital.org/)
 
 TO-DO
 -----