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+# Naming convention
+
+- [ ] Sequencer internal variables which are only used inside sequencer
+
+* lower case
+* prefix `_sqr_`
+
+- [ ] Sequencer "global" variables which can be also used in seqs
+
+* lower case
+* prefix `sqr_`
+
+- [ ] Sequencer provides some global seq related variables 
+
+* lower case
+* prefix `seq_` or internal use `_seq_`
+
+For variables inside seqs it is recommended to be prefixed with `sq_[SEQ SHORT]`
+
+e.g. for nextcloud.sh
+`sq_ncinstallDir="/var/www/nextcloud"`
+
+For seq configuration variables it is recommended to prefix them with `sc_[SEQ SHORT]`
+
+e.g. for nextcloud.cfg(.example)
+`sc_ncinstallDir="/var/www/nextcloud"`
+
+# Indentation
+
+Sequencer.sh and all seqs use the following indentation rules
+
+* indent style: space
+* indent size : 2 
+
+# Auto indentation
+
+Please use the seq `vim.sh setup` to:
+
+* configure vim for auto indentation
+* install vim indent script for .sh files
+* install [editorconfig](https://github.com/editorconfig/editorconfig-vim)