| Acronym | Interaction Metrics—Purchasing Facet | |
| Full Title | Description | |
| ALI | Alphabetical Index | Existence of alphabetical index |
| DNM | Depth of Navigation Map | Maximum depth of navigation map |
| FAQ | FAQ feature | Existence of FAQ features |
| HOP | HOme Pages | Number of major entry points to the web applications |
| IND | INput Data | Input data for each operation |
| LAV | LAnguage Versions | Number of different languages |
| NWC | Number of Web Components | Number of applets, agents |
| OTI | OTher Indexes | Existence of other indexes |
| OUD | OUtput Data | Output data for each operation |
| SIM | SIte Map | Existence of navigation map |
| SUI | SUbject Index | Existence of subject index |
| WEP | WEb Pages | Number of web pages in an application |