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| '''1. Metadata'''
| 1. Key/value pairs, in no particular order ({{Type|Token}}/{{Type|Token}}):<br/> • Examples: {{Code|FNAME}}, {{Code|TIME}}, {{Code|SIZE}}, ...<br /> • {{Code|PERM}} → Number of users ({{Type|Num}}), and name/password/permission values for each user ({{Type|Token}}/{{Type|Token}}/{{Type|Num}})<br/>2. Empty key as finalizer
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| '''2. Main memory indexes'''
| 1. Key/value pairs, in no particular order ({{Type|Token}}/{{Type|Token}}):<br /> • {{Code|TAGS}} → Element Name Index<br /> • {{Code|ATTS}} → Attribute Name Index<br /> • {{Code|PATH}} → Path Index<br /> • {{Code|NS}} → Namespaces<br /> • {{Code|DOCS}} → Document Index<br/>2. Empty key as finalizer
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| '''2 a) Name Index'''<br/>Element/attribute names
| 1. Token set, storing all names ({{Type|TokenSet}})<br />2. One StatsKey instance per entry:<br/>2.1. Content kind ({{Type|Num}}):<br />2.1.1. Number: min/max ({{Type|Doubles}})<br />2.1.2. Category: number of entries ({{Type|Num}}), entries ({{Type|Tokens}})<br />2.2. Number of entries ({{Type|Num}})<br />2.3. Leaf flag ({{Type|Boolean}})<br />2.4. Maximum text length ({{Type|Double}}; legacy, could be {{Type|Num}})
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| '''2 b) Path Index'''