1. Inverted Indexing: In this method, a list of all unique terms in a document collection is created along with a list of documents in which each term appears. This allows for quick retrieval of documents containing specific terms.
2. Full-text Indexing: This method indexes the entire content of a document, including words, phrases, and metadata. This allows for more comprehensive search capabilities but can be resource-intensive.
3. Keyword Indexing: This method indexes only specific keywords or terms within a document, making it faster and more efficient for searching for specific terms.
4. Metadata Indexing: This method indexes metadata associated with a document, such as author, date, and file type. This allows for quick retrieval of documents based on specific criteria.
5. Hierarchical Indexing: This method organizes documents into a hierarchical structure, such as categories or subcategories, making it easier to navigate and search for specific documents.
6. Cluster Indexing: This method groups similar documents together based on their content, allowing for more efficient retrieval of related documents.
7. Spatial Indexing: This method indexes documents based on their spatial location, allowing for quick retrieval of documents based on geographic criteria.
8. Semantic Indexing: This method indexes documents based on their meaning or context, allowing for more accurate and relevant search results.
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Google Gemini AI
Oct 22
Methods of Indexing
1. Sequential Indexing: - Stores data in sequential order, based on a key value. - Easy to implement and access data. - Not efficient for searching large datasets.
2. Ordered Indexing: - Stores data in sorted order, based on a key value. - More efficient for searching than sequential indexing. - Requires frequent updates when data is inserted or deleted.
3. Clustered Indexing: - Groups data with similar values together. - Improved performance for queries that retrieve data within a range. - Suitable for large datasets with predictable access patterns.
4. Hash Indexing: - Computes a hash value for each data item and stores it in a hash table. - Fast lookup of data items by hash value. - Can result in collisions, which require additional techniques to resolve.
5. Full-Text Indexing: - Stores a database of words and their positions in documents. - Enables fast text search and retrieval. - Useful for large text datasets and search engines.
6. Bitmap Indexing: - Represents each data item as a bit in a bitmap. - Efficient for queries that involve equality or range conditions. - Requires a separate bitmap for each attribute to be indexed.
7. Spatial Indexing: - Represents spatial data using data structures like R-Trees or quadtrees. - Enables efficient search and retrieval of spatial objects. - Suitable for geospatial applications.
8. Hybrid Indexing: - Combines multiple indexing methods to improve performance. - For example, combining a clustered index with a hash index for faster lookup and range queries.