[Verse 1]
In two thousand three the architects convened
OASIS forged a standard, built to intervene
Between the user's hunger and the data they seek
XACML emerged, the gatekeeper unique
Attribute-based decisions, policies refined
The access control sovereign of digital design
[Chorus]
PEP enforces, PDP decides
PIP provides the attributes that guide
PAP authors rules in structured code
XACML reigns where permissions flow
Request and response in perfect time
The Access Control King's paradigm
[Verse 2]
Policy Enforcement Point stands guard at doors
Intercepts each query, evaluates and scores
Sends the plea downstream to the brain supreme
Policy Decision Point weighs the scheme
Context handlers gather facts from every source
While evaluation engines chart the proper course
[Chorus]
PEP enforces, PDP decides
PIP provides the attributes that guide
PAP authors rules in structured code
XACML reigns where permissions flow
Request and response in perfect time
The Access Control King's paradigm
[Bridge]
Policy Information Point feeds the machine
Subject, resource, action, environment clean
Policy Administration Point crafts the law
XML structures without a flaw
Interchange between systems, vendors align
Twenty years of evolution, tested design
[Verse 3]
Obligations trigger when permits are granted
Advice flows freely where access is planted
Combining algorithms merge the verdicts cast
Permit, deny, indeterminate, not applicable passed
Enterprise security finds its trusted friend
In XACML's dominion that will never bend
[Chorus]
PEP enforces, PDP decides
PIP provides the attributes that guide
PAP authors rules in structured code
XACML reigns where permissions flow
Request and response in perfect time
The Access Control King's paradigm
[Outro]
From healthcare vaults to corporate towers high
The standard mediates who, what, when and why
Attribute-based monarchy rules the realm
XACML forever at the helm