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Revision 8 (Michel Condemine Admin, 02/22/2023 10:00 PM) → Revision 9/17 (Michel Condemine Admin, 02/22/2023 10:07 PM)
# OpenOpcUaWiki ## OPC Foundation LDS * The Local Discovery Server (LDS) provides the necessary infrastructure to publicly expose the OPC UA Servers available on a given computer. * When OpenOpcUaCoreServer is configured to register to the LDS you have to copy its certificate in C:\ProgramData\OPC Foundation\UA\Discovery\pki\trusted\certs when using the OPC Fondation LDS. ## What is ETL? * ETL, which stands for extract, transform and load, is a data integration process that combines data from multiple data sources into a single, consistent data store that is loaded into a data warehouse or other target system. * OOUACoreServer is the perfect software to achieve ETL. ## #. ASCII_TABLE  Table](http://www.openopcua.org/redmine/attachments/download/3845/ASII_TABLE.jpg) ## h1. LUA Tutorial Link [Overview](https://www.tutorialspoint.com/lua/lua_overview.htm) [if_else](https://www.tutorialspoint.com/lua/if_else_statement_in_lua.htm) * [[https://www.tutorialspoint.com/lua/if_else_statement_in_lua.htm]]