The Search Lucene API project maintains a consistent versioning system for site administrators to determine the state of the code they are using. Like most contributed modules, Search Lucene API is built for a specific version of Drupal. As an example, the 5.x-1.1 release is designed solely for Drupal 5 and will not work with Drupal 6 installations. You can find the version of Drupal your site is running by navigating to Administer > Reports > Status report.
Significant changes in the module are denoted by its major version. The 6.x-1.1 and 6.x-2.1 releases differ in their major versions and are not considered to be compatible. Upgrading from the 1.0 API to its 2.0 counterpart will break contributed modules and custom code that depend on Search Lucene API.
Bug fixes and small changes are flagged in the module's minor version. For example, the 6.x-1.1 and 6.x-1.2 releases differ in their minor versions. Bugs exist in the 6.x-1.1 release that are fixed in 6.x-1.2. Upgrading from one minor version to another is considered safe, but it is strongly advised to thoroughly test the upgrade before going live with the changes.
Pre-stable versions of Search Lucene API are released to the public for testing and review. Development releases have an extra alphanumeric
All versions listed above are examples of stable releases. Code flagged as stable has been tested and implemented on production
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