incorporation 软件包指定可以安装哪些软件包版本。这些版本约束有助于使系统在更新后仍保持在可支持的状态。有关 incorporation 软件包和约束的更多信息，请参见incorporation 软件包。
某些合并的软件包可以安全地降级或升级到与 incorporation 所指定的版本不同的版本。版本约束由在 incorporation 软件包中指定的 version-lock.package 侧面表示。version-lock.package 侧面的缺省值是 true。要放宽对软件包的版本约束，请将其 version-lock. 侧面的值设置为 false。
在以下示例中，您希望将软件包降级到较早版本。pkg update 命令可对软件包进行降级与升级。
$ pkg list -af library/security/openssl NAME (PUBLISHER) VERSION IFO library/security/openssl 1.0.1.5-0.175.2.0.0.24.0 i-- library/security/openssl 1.0.1.5-0.175.2.0.0.23.0 --- $ pkg update library/security/openssl@1.0.1.5-0.175.2.0.0.23.0 Creating Plan (Solver setup): | pkg update: No matching version of library/security/openssl can be installed: Reject: pkg://solaris/library/security/openssl@1.0.1.5,5.11-0.175.2.0.0.23.0:20130916T191702Z Reason: This version is excluded by installed incorporation pkg://solaris/consolidation/userland/userland-incorporation@0.5.11,5.11-0.175.2.0.0.24.0:20131001T160408Z
pkg contents 命令会显示该版本约束是如何设置的。要放宽对该软件包的版本约束，请将其 version-lock 侧面设置为 false。然后再次尝试降级。请注意，未创建一个新的 BE，而是创建了一个备份 BE。有关何时创建 BE 的信息，请参见引导环境策略映像属性。
$ pkg contents -m userland-incorporation | grep 'library/security/openssl'
depend facet.version-lock.library/security/openssl=true
fmri=pkg:/library/security/openssl@1.0.1.5-0.175.2.0.0.24.0 type=incorporate
$ pkg change-facet facet.version-lock.library/security/openssl=false
Packages to update: 850
Variants/Facets to change: 1
Create boot environment: No
Create backup boot environment: Yes
PHASE ITEMS
Removing old actions 1/1
Updating image state Done
Creating fast lookup database Done
Reading search index Done
Building new search index 850/850
$ pkg update library/security/openssl@1.0.1.5-0.175.2.0.0.23.0
Packages to update: 1
Create boot environment: No
Create backup boot environment: Yes
DOWNLOAD PKGS FILES XFER (MB) SPEED
Completed 1/1 10/10 1.6/1.6 0B/s
PHASE ITEMS
Removing old actions 3/3
Installing new actions 3/3
Updating modified actions 14/14
Updating package state database Done
Updating package cache 1/1
Updating image state Done
Creating fast lookup database Done
Reading search index Done
Updating search index 1/1
$ pkg list library/security/openssl
NAME (PUBLISHER) VERSION IFO
library/security/openssl 1.0.1.5-0.175.2.0.0.23.0 i--要防止降级或升级该软件包，请将该软件包冻结在当前版本。软件包列表中的 “f” 指示软件包已冻结。
$ pkg freeze -c "Downgrade to avoid bug" library/security/openssl library/security/openssl was frozen at 1.0.1.5,5.11-0.175.2.0.0.23.0:20130916T191702Z $ pkg list library/security/openssl NAME (PUBLISHER) VERSION IFO library/security/openssl 1.0.1.5-0.175.2.0.0.23.0 if-
要重新启用降级或升级，请使用 pkg unfreeze 命令来删除版本冻结。如果软件包的安装版本低于 incorporation 软件包中指定的版本，则将此软件包的 version-lock 侧面设置为 true 将安装 incorporation 软件包中指定的版本。
如果其他已安装的软件包与您要降级或升级的软件包之间存在 require 依赖关系，则您可能还需要对这些相关的软件包放宽版本约束。在以下示例中，已在 hexedit 软件包上解除了版本约束，但由于在 system/library 软件包中存在版本约束，所以安装遭到拒绝。
$ pkg install editor/hexedit@1.2.12-0.175.2.0.0.25.0
Creating Plan (Solver setup): -
pkg install: No matching version of editor/hexedit can be installed:
Reject: pkg://solaris/editor/hexedit@1.2.12-0.175.2.0.0.25.0:20131014T170634Z
Reason: All versions matching 'require' dependency
pkg:/system/library@0.5.11,5.11-0.175.2.0.0.24.0 are rejected
Reject: pkg://solaris/system/library@0.5.11,5.11-0.175.2.0.0.24.0:20131001T152820Z
pkg://solaris/system/library@0.5.11,5.11-0.175.2.0.0.25.0:20131014T161136Z
Reason: This version is excluded by installed incorporation
pkg://solaris/consolidation/osnet/osnet-incorporation@0.5.11,5.11-0.175.2.0.0.24.0:20131001T150429Z除了单个的组件软件包，您还可以对 incorporation 放宽版本约束。在此情况下，将 version-lock 侧面设置为 false 可解除对系统其余部分的 incorporation 的锁定。虽然已解除对 incorporation 软件包的锁定，但仍会继续同步它合并的软件包。