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[ENH] relax ieeg channel name requirements of letters and numbers only #182

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Mar 25, 2019
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[ENH] relax ieeg channel name requirements of letters and numbers only #182

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2 changes: 1 addition & 1 deletion src/04-modality-specific-files/04-intracranial-electroencephalography.md
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Expand Up @@ -231,7 +231,7 @@ MUST be present:

| Column name | Definition |
| :----------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| name | REQUIRED. Label of the channel, only contains letters and numbers. The label must correspond to \_electrodes.tsv name and all ieeg type channels are required to have a position. The reference channel name MUST be provided in the reference column. |
| name | REQUIRED. Label of the channel. The label must correspond to \_electrodes.tsv name and all ieeg type channels are required to have a position. The reference channel name MAY be provided in the reference column. |
| type | REQUIRED. Type of channel, see below for adequate keywords in this field. |
| units | REQUIRED. Physical unit of the value represented in this channel, e.g., V for Volt, specified according to the [SI unit symbol](https://en.wikipedia.org/wiki/International_System_of_Units#Base_units) and possibly prefix symbol (e.g., mV, μV). For guidelines for Units and Prefixes see [Appendix V](../99-appendices/05-units.md). |
| low_cutoff | REQUIRED. Frequencies used for the low pass filter applied to the channel in Hz. If no low pass filter was applied, use `n/a`. Note that anti-alias is a low pass filter, specify its frequencies here if applicable. |
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