There is a lot of confusion in terms of proper software development. Below I will try to gather some important resources that will halp in organised approach towards the topic.

Specyfikacje

1. UML 2.5.1. by OMG
2. BPMN 2.0 by OMG

Bibliografia

@misc{GlossarWiki:OMG:UML_2.5.1,
author = {Management Group, Object},
title = {OMG Unified Modeling Language -- Version 2.5.1},
howpublished = {https://www.omg.org/spec/UML/2.5.1},
year = {2017},
month = Dec,
url = {https://www.omg.org/spec/UML/2.5.1},
quality = {5},
note = {}
}
@standard{omg2011bpmn,
added-at = {2013-02-22T22:42:18.000+0100},
author = {OMG},
biburl = {https://www.bibsonomy.org/bibtex/2d71e28d8b21b73a067683ba4bfe0321a/porta},
file = {omg2011bpmn.pdf:omg2011bpmn.pdf:PDF},
groups = {public},
institution = {Object Management Group},
interhash = {3dc7b0ecb231121716362e43297fd70a},
intrahash = {d71e28d8b21b73a067683ba4bfe0321a},
keywords = {omg standard bpmn},
month = {January},
organization = {Object Management Group},
revision = {2.0},
timestamp = {2013-03-01T23:25:34.000+0100},
title = {{Business Process Model and Notation (BPMN), Version 2.0}},
url = {http://www.omg.org/spec/BPMN/2.0},
username = {porta},
year = 2011
}