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Tax lots · lot 1.1

Tax lots. Open tax lots per account and security with acquired date and unit cost, so tax-aware rebalancing uses your real lots. One lot per account, security and date (several purchases on one day are one lot). Key: account + symbol + acquired_on.

Namespace: urn:vestoris:feed:lot:1.1
Schema: lot-1.1.xsd
Also accepted: urn:vestoris:feed:lot:1.0 (lot-1.0.xsd)
Key (upsert): account + symbol + acquiredOn: a record with an existing key updates it; a new key inserts.
Start-of-day step: Positions, lots and cash
File name: F00012_LOT_20261023_001.xml
Modes: delta (action="delete" removes a record); full (records not listed are inactivated, up to the feed's safety threshold: H201)

The <feed> root #

Attribute	Use	Type	Meaning
`businessDate`	required	`xs:date`	The business date the data is for (YYYY-MM-DD).
`firm`	required	`xs:string`	Your firm code, shown on Data › Feeds (e.g. F00012).
`source`	optional	`xs:string`	Who produced the file (vendor or system name).
`generated`	required	`xs:dateTime`	When the file was produced (UTC).
`recordCount`	required	`xs:nonNegativeInteger`	The number of record elements. A file whose count does not match is refused (F004): it was probably cut short.
`mode`	optional (default delta)	`xs:string`	delta: only the records in the file change, and action="delete" removes one. full: the file is complete; records it does not list are inactivated, up to the feed's safety threshold.

The <record> elements #

upsert (insert or update by key) or delete (removes the record; a security or account is inactivated, never deleted). Elements may appear in any order; an element that is left out keeps its current value.

Element	Required	Type	Meaning	Codes
`account` key #	yes	`xs:string` pattern [A-Z0-9][A-Z0-9_.\-]{0,19}	The account code. Part of the key. A code: letters, digits, "_", "." or "-", up to 20. Part of the key. Example: `GRW-A`	`R101` `R111` `R109`
`symbol` key #	yes	`xs:string` pattern [A-Z][A-Z0-9.\-]{0,11}	The security. Part of the key. A ticker symbol: letters, digits, "." or "-", up to 12. Part of the key. Example: `AAPL`	`R101` `R111` `R109`
`acquiredOn` key #	yes	`xs:date`	The acquired (trade) date. Part of the key. An ISO date, YYYY-MM-DD. Part of the key. Example: `2024-03-14`	`R101` `R102`
`quantity` #	yes	`xs:decimal` 25 digits; 10 decimals	Open shares in the lot. A decimal number written as text, e.g. 1234.5. Example: `1500`	`R101` `R103` `R111`
`unitCost` #	yes	`xs:decimal` ≥ 0; 25 digits; 10 decimals	Cost per share. A decimal number written as text, e.g. 1234.5 (min 0). Example: `171.25`	`R101` `R103` `R111`

Validation #

No DOCTYPE or entity declaration (F002); well-formed UTF-8 (F001).
The namespace and version are published (F007), and the file matches the XSD (F003).
Header: firm is your firm code (F006), businessDate a business day (F005), recordCount the number of records (F004).
Each record: the field checks in the table above, references to records that exist (R109), no key twice in a file (R110). A rejected record does not stop the rest of the file.

Codes this format can return: F001 F002 F003 F004 F005 F006 F007 F008 H201 R101 R102 R103 R109 R110 R111

Sample #

An annotated file: the comment lines explain the header; drop them or keep them, comments are allowed.

<?xml version="1.0" encoding="UTF-8"?>
<!-- businessDate: the date the data is for. firm: your firm code. recordCount: how many <record> elements follow. -->
<feed xmlns="urn:vestoris:feed:lot:1.1" businessDate="2026-10-23" firm="F00012" source="ExampleVendor" generated="2026-10-23T22:05:00Z" recordCount="2" mode="delta">
  <record action="upsert">
    <account>GRW-A</account>
    <symbol>AAPL</symbol>
    <acquiredOn>2024-03-14</acquiredOn>
    <quantity>1500</quantity>
    <unitCost>171.25</unitCost>
  </record>
  <record action="upsert">
    <account>GRW-A</account>
    <symbol>AAPL</symbol>
    <acquiredOn>2025-09-02</acquiredOn>
    <quantity>800</quantity>
    <unitCost>229.10</unitCost>
  </record>
</feed>

Download the sample Download the XSD Validate a file

Version history #

1.0 (2026-10-26): First published version.
1.1 (2026-10-26): Adds the optional <udfs> element (up to ten <udf slot="1..10" name="...">value</udf>) to the reference formats that carry user-defined fields: security, issuer, account, accountgroup, broker, model, benchmark and list. Additive: every valid 1.0 file is still accepted under its 1.0 namespace.