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The meat of the software configuration is divided across two sections of the shibboleth2.xml file: the <RequestMapper> and the <ApplicationDefaults> elements. In the case of Apache, the former is generally omitted in favor of Apache-specific commands.

Assigning Resources to Applications

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With V3, there's a new setting, selfEntityIDentityIDSelf, which attacks the opposite problem, defining each virtual host as its own logical SP with a pattern-based entityID derived from the virtual host name. The goal is to eliminate as much as practical any need to define overrides at all.

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One of the most common things when creating an override is to assign it a special entityID, making it a distinct logical SP living inside the same physical installation. This is done by adding an entityID property to the <ApplicationOverride> element. With V3, this can even be avoided by assigning each virtual host to selfEntityID a entityIDSelf content setting that allows the system to derive its own name at runtime based on the virtual host accessed.

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