# The concepts of AxoSyslog This chapter discusses the technical concepts of AxoSyslog. * * * [The philosophy of AxoSyslog](../docs/axosyslog-core/chapter-concepts/syslog-ng-philosophy/index.md) [Logging with AxoSyslog](../docs/axosyslog-core/chapter-concepts/concepts-logging-with-syslog-ng/index.md) [Modes of operation](../docs/axosyslog-core/chapter-concepts/concepts-modes-of-operation/index.md) [Global objects](../docs/axosyslog-core/chapter-concepts/msgroute/index.md) [Timezones and daylight saving](../docs/axosyslog-core/chapter-concepts/timezone-handling/index.md) [Product licensing](../docs/axosyslog-core/chapter-concepts/concepts-licensing/index.md) [High availability support](../docs/axosyslog-core/chapter-concepts/concepts-high-availability/index.md) [The structure of a log message](../docs/axosyslog-core/chapter-concepts/concepts-message-structure/index.md) [Message representation in AxoSylog](../docs/axosyslog-core/chapter-concepts/concepts-message-representation/index.md) [Structuring macros, metadata, and other value-pairs](../docs/axosyslog-core/chapter-concepts/concepts-value-pairs/index.md) [Things to consider when forwarding messages between AxoSyslog hosts](../docs/axosyslog-core/chapter-concepts/concepts-things-to-consider/index.md) Last modified October 22, 2023: [Use product.abbrev variable instead of product.ose (5c18e40)]()